v0.3.2

Non-breaking bug-fixes and improvements

• Emitter types added
  • Gaussian beam profile
  • Point source
• Fixing indexing in volume measurements for the upper bound to be
  clipped to the last index, instead of panic with index overflow
• photon_collector_<detector_name>.csv is now named properly instead
  of photon_collector_{<detector_name>}.csv
• Intersection distances reworked
• Photon packet now also holds the inverse of its direction components,
  such that intersection can be computed more easily based on MUL
  operations instead of long DIV operations.
• Add benchmarks for performance and accuracy
  • Diffusion example is used with conditions to easily satisfy the
    diffusion approximation
  • Silence ProgressBar while benchmarking
• Cleanup a big bulk of clippy issues
• Build trait now accepts metadata. Used primarily to pass Set key to
  the underlying value being built, such as in the case of scene, where

What's Changed

• Nix flakes: env and toolchain setup + git hooks by @crisbour in #92
• Emitter: Gaussian beam and isotropic point source by @crisbour in #93
• Fixes: Output volume idx, paths fmt, cleanup, variance in test by @crisbour in #94
• Invdir: Speed-up holding ray inverse direction by @crisbour in #95
• Bencher: Add benchmarks and log them to bencher.dev by @crisbour in #96

Full Changelog: v0.3.1...v0.3.2