docs: add Discord badge to GitHub README

[samestep]

Description

Using this: https://github.com/gitlimes/discord-md-badge

Checklist

• I have commented my code, particularly in hard-to-understand areas
• I have reviewed any generated registry diagram changes

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📊 Performance

Key

Note that each bar component rounds up to the nearest 100ms, so each full bar is an overestimate by up to 400ms.

     0s   1s   2s   3s   4s   5s   6s
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name ▝▀▀▀▀▀▀▀▀▀▚▄▄▄▄▄▄▄▄▄▄▞▀▀▀▀▀▀▀▀▀▘
      compiling optimizing rendering

If a row has only one bar instead of four, that means it's not a trio and the bar just shows the total time spent for that example, again rounded up to the nearest 100ms.

Data

                                                          0s   1s   2s   3s   4s   5s   6s   7s   8s
                                                          |    |    |    |    |    |    |    |    |
set-theory-domain/tree-venn                               ▝▀▀▞
set-theory-domain/tree-tree                               ▝▀▚▘
group-theory/quaternion-multiplication-table              ▝▀▀▀▀▞▀
walk-on-spheres/SignedAngleOutside                        ▝▀▀▀▚▀
spectral-graphs/examples/hypercube                        ▝▀▀▞
group-theory/quaternion-cayley-graph                      ▝▀▚▀
set-theory-domain/tree-venn-3d                            ▝▚▀
atoms-and-bonds/one-water-molecule                        ▝▞
structural-formula/molecules/caffeine                     ▝▀▀▀▀▀▄▞▀
walk-on-spheres/walk-on-stars                             ▝▀▀▀▀▀▚▀▀▀
set-theory-domain/continuousmap                           ▝▚▘
mobius/mobius                                             ▝▚▘
linear-algebra-domain/two-vectors-perp                    ▝▚▘
tutorials/tutorial1                                       ▝▞
tutorials/tutorial2                                       ▝▞
tutorials/tutorial3                                       ▝▞
molecules/nitricacid-lewis                                ▝▀▀▀▞
exterior-algebra/vector-wedge                             ▝▚▘
shape-spec/all-shapes                                     ▝▚▀▘
shape-spec/arrowheads                                     ▝▚▘
graph-domain/textbook/sec1/fig1                           ▝▀▀▚▄▘
graph-domain/textbook/sec1/fig2                           ▝▀▀▀▚▄▞
graph-domain/textbook/sec1/fig3                           ▝▀▀▀▀▀▄▄▞
graph-domain/textbook/sec1/fig4                           ▝▀▀▀▀▄▄▘
spectral-graphs/examples/hexagonal-lattice                ▝▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▚▄▞▀▀
graph-domain/textbook/sec1/fig5                           ▝▀▀▀▀▀▚▄▄▄▞
graph-domain/textbook/sec1/fig6                           ▝▀▀▀▀▀▀▀▀▀▀▀▀▀▀▚▄▄▄▄▄▄▄▄▄▄▄▄▄▄▞
graph-domain/textbook/sec1/fig7                           ▝▀▀▞
graph-domain/textbook/sec1/fig8a                          ▝▀▀▀▀▀▚▄▄▞
graph-domain/textbook/sec1/fig8b                          ▝▀▀▀▀▚▄▄▞
graph-domain/textbook/sec1/fig9                           ▝▀▀▀▀▄▞
graph-domain/textbook/sec1/fig10                          ▝▀▀▚▀
graph-domain/textbook/sec1/fig11                          ▝▀▀▀▀▚▄▀
graph-domain/textbook/sec1/fig12                          ▝▀▀▀▀▀▚▄▄▀
graph-domain/textbook/sec1/fig13                          ▝▀▀▀▀▄▄▀▘
graph-domain/textbook/sec2/fig3                           ▝▀▀▀▀▀▀▀▀▚▄▄▄▄▞
graph-domain/textbook/sec2/fig4                           ▝▀▀▀▀▀▚▄▄▞
graph-domain/textbook/sec2/fig5                           ▝▀▀▀▀▀▀▀▀▀▀▄▄▄▄▞
graph-domain/textbook/sec2/fig6                           ▝▀▀▀▀▀▀▀▀▚▄▄▄▄▞
graph-domain/textbook/sec2/fig9                           ▝▀▀▀▀▀▀▀▀▀▀▀▀▄▄▄▄▄▄▄▘
graph-domain/textbook/sec2/fig10a                         ▝▀▀▀▄▄▘
graph-domain/textbook/sec2/fig10b                         ▝▀▀▀▄▀
graph-domain/textbook/sec2/fig11a                         ▝▀▚▘
graph-domain/textbook/sec2/fig11b                         ▝▀▚▘
graph-domain/textbook/sec2/fig11c                         ▝▀▚▘
graph-domain/textbook/sec2/fig12                          ▝▀▀▄▞
graph-domain/textbook/sec2/fig13                          ▝▀▀▀▀▀▀▀▀▀▀▀▀▚▄▄▄▄▄▄▄▄▄▄▄▄▄▄▘
graph-domain/textbook/sec2/fig14                          ▝▀▀▀▚▄▞
graph-domain/textbook/sec2/fig16b                         ▝▀▀▀▚▀
geometry-domain/textbook_problems/c05p13                  ▝▀▀▞
geometry-domain/textbook_problems/c01p01                  ▝▀▀▞
geometry-domain/textbook_problems/c03p01                  ▝▀▀▞
geometry-domain/textbook_problems/c05p01                  ▝▀▀▞
geometry-domain/textbook_problems/ex                      ▝▀▀▀▄▘
triangle-mesh-3d/two-triangles                            ▝▀▞
random-sampling/test                                      ▝▀▀▀▚▘
geometry-domain/textbook_problems/c11p12                  ▝▀▀▚▞
curve-examples/catmull-rom/catmull-rom                    ▝▚▘
word-cloud/example                                        ▝▀▀▄▞
geometry-domain/siggraph-teaser                           ▝▀▀▚▘
minkowski-tests/maze/non-convex                           ▝▀▞
lagrange-bases/lagrange-bases                             ▝▚▘
hypergraph/hypergraph                                     ▝▀▀▀▀▀▄▄▄▄▄▄▄▄▄▘
persistent-homology/persistent-homology                   ▝▀▀▚▄▄▄▀▘
walk-on-spheres/laplace-estimator                         ▝▀▀▚▘
walk-on-spheres/poisson-estimator                         ▝▀▀▚▘
walk-on-spheres/nested-estimator                          ▝▀▀▀▚▀
walk-on-spheres/offcenter-estimator                       ▝▀▀▚▘
shape-distance/points-around-star                         ▝▀▀▀▚▀
shape-distance/points-around-polyline                     ▝▀▀▞
shape-distance/points-around-line                         ▝▀▀▞▘
shape-distance/lines-around-rect                          ▝▀▞
fake-3d-linear-algebra/projection                         ▝▚▘
animation/center-shrink-circle                            ▝▞
graph-domain/other-examples/hamiltonian-cycle             ▝▀▀▀▚▄▀
structural-formula/reactions/methane-combustion           ▝▀▀▀▀▄▄▄▄▞
molecules/glutamine                                       ▝▀▚▘
matrix-ops/tests/matrix-matrix-addition                   ▝▀▞
matrix-ops/tests/matrix-matrix-division-elementwise       ▝▀▞
matrix-ops/tests/matrix-matrix-multiplication-elementwise ▝▀▞
matrix-ops/tests/matrix-matrix-multiplication             ▝▀▞
matrix-ops/tests/matrix-matrix-subtraction                ▝▀▞
matrix-ops/tests/matrix-transpose                         ▝▀▞
matrix-ops/tests/matrix-vector-left-multiplication        ▝▀▞
matrix-ops/tests/matrix-vector-right-multiplication       ▝▀▞
matrix-ops/tests/scalar-vector-division                   ▝▀▞
matrix-ops/tests/scalar-vector-left-multiplication        ▝▀▞
matrix-ops/tests/scalar-vector-right-multiplication       ▝▚▘
matrix-ops/tests/vector-vector-addition                   ▝▀▚▘
matrix-ops/tests/vector-vector-division-elementwise       ▝▀▞
matrix-ops/tests/vector-vector-multiplication-elementwise ▝▀▞
matrix-ops/tests/vector-vector-outerproduct               ▝▀▞
matrix-ops/tests/vector-vector-subtraction                ▝▚▘
logic-circuit-domain/half-adder                           ▝▀▞
curve-examples/cubic-bezier                               ▝▀▄▞
triangle-mesh-2d/diagrams/cotan-formula                   ▝▀▀▞
triangle-mesh-2d/diagrams/concyclic-pair                  ▝▀▚▘
triangle-mesh-2d/diagrams/halfedge-mesh                   ▝▀▚▘
triangle-mesh-2d/diagrams/relative-orientation            ▝▀▚▘
triangle-mesh-2d/diagrams/triangle-centers                ▝▀▞
triangle-mesh-2d/diagrams/angle-equivalence               ▝▀▀▚▄▞
timeline/penrose                                          ▝▀▀▀▀▄▘
graph-domain/textbook/sec5/ex32                           ▝▀▀▀▀▀▀▀▀▀▀▀▚▄▄▄▄▄▄▄▄▄▄▄▘
curve-examples/open-elastic-curve                         ▝▀▀▄▘
curve-examples/closed-elastic-curve                       ▝▀▀▄▞
graph-domain/other-examples/arpanet                       ▝▀▀▀▀▀▀▀▀▀▚▄▄▄▄▄▄▄▄▄▘
graph-domain/other-examples/nyc-subway                    ▝▀▀▀▀▀▀▀▀▀▀▀▀▀▀▚▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▞
fancy-text/fancy-text                                     ▝▀▀▄▘
curve-examples/blobs                                      ▝▀▀▀▀▀▀▀▀▚▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▞
curve-examples/space-curves                               ▝▀▀▀▀▀▀▚▄▄▘
geometric-queries/ray-intersect/test-group                ▝▀▀▀▀▀▀▀▀▀▚▀
ray-tracing/path-trace                                    ▝▀▀▞
ray-tracing/bidirectional                                 ▝▀▀▞
ray-tracing/next-event-estimation                         ▝▀▀▚▘
geometric-queries/test                                    ▝▀▚▘
geometric-queries/closest-point/test-group                ▝▀▞
geometric-queries/closest-point/test                      ▝▚▘
geometric-queries/closest-silhouette-point/test           ▝▚▘
geometric-queries/ray-intersect/test                      ▝▀▀▀▀▀▀▀▀▚▀▀▘
box-arrow-diagram/computer-architecture                   ▝▀▀▀▀▀▀▀▀▀▀▀▀▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▞
stochastic-process/stochastic-process                     ▝▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▞▀▀▀▀▀
stochastic-process/epsilon-shell/AbsorbingBoundary        ▝▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▚▀▀▀▀▀▀▀▀▀▘
solid/eigenspace                                          ▐█▌
solid/triangles                                           ▐█
solid/vectors                                             ▐▌
tsne/tsne                                                 ▝▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▄▄▄▄▄▄▄▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀
spectral-graphs/examples/4x4-sudoku-graph                 ▝▀▀▀▀▀▀▚▞▀
spectral-graphs/examples/dodecahedral-graph               ▝▀▀▞▘
atoms-and-bonds/wet-floor                                 ▝▀▄▘
curve-examples/offset                                     ▝▀▚▄▘
curve-examples/frenet-frame                               ▝▀▞
curve-examples/osculating-circle                          ▝▚▘
curve-examples/evolute-of-cardioid                        ▝▀▀▀▞