feat(core): add tracespace core package

[mcous]

This PR adds a new package - @tracespace/core - to take care of the logic that used to live in pcb-stackup and pcb-stackup-core.

Compared to the parser, plotter, and renderer, the core library understands that its input represents all the files related to a single PCB. It is also the new home for board shape determination.

[mcous]

Current dependencies on/for this PR:

• v5
  • PR chore: upgrade dependencies #394
    • PR refactor(identify-layers)!: rename whats-that-gerber to @tracespace/identify-layers #407
      • PR fix(parser): recognize drill file header markers #398
        • PR refactor(plotter,renderer): convert coordinates to SVG instead of transform #395
          • PR feat(core): add tracespace core package #402 👈
            • PR refactor(cli)!: rewrite CLI on new render pipeline #405
              • PR chore(release): 5.0.0-alpha.0 #406
              • PR feat(www): add initial tracespace view page #397
          • PR chore(www): update build and test environment #396

This comment was auto-generated by Graphite.

[codecov]

Codecov Report

Merging #402 (840e022) into v5 (d37eed5) will decrease coverage by 1.00%.
The diff coverage is 82.91%.

@@            Coverage Diff             @@
##               v5     #402      +/-   ##
==========================================
- Coverage   91.58%   90.57%   -1.01%     
==========================================
  Files          35       44       +9     
  Lines        4609     5349     +740     
  Branches      513      611      +98     
==========================================
+ Hits         4221     4845     +624     
- Misses        388      504     +116     

Impacted Files	Coverage Δ
packages/core/src/index.ts	58.79% <58.79%> (ø)
packages/core/src/sort-layers.ts	69.56% <69.56%> (ø)
packages/parser/src/index.ts	98.73% <75.00%> (-1.27%)	⬇️
packages/core/src/read-file.ts	86.27% <86.27%> (ø)
packages/core/src/board-shape/index.ts	96.80% <96.80%> (ø)
packages/core/src/board-shape/fill-gaps.ts	96.96% <96.96%> (ø)
packages/core/src/board-shape/walk-paths.ts	100.00% <100.00%> (ø)
packages/core/src/determine-layer-types.ts	100.00% <100.00%> (ø)
packages/core/src/stringify-svg.ts	100.00% <100.00%> (ø)
packages/renderer/src/index.ts	100.00% <0.00%> (ø)
... and 1 more

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