perf(extract): splits compiler availability and execution

[sverweij]

Description

• repurposes src/extract/transpile/meta.mjs as a main entry for transpilation & data about transpilation options available in the environment to just the data about transpilation.
• adds a new utility to check whether a transpiler is available - one that just require.resolve's the thing instead of importing or requiring it. This is a lot faster, especially when checking for big transpiler modules (e.g. typescript, babel).
• moves transpilation itself to src/extract/transpile/index.mjs

Motivation and Context

• Better design wise
  The meta.mjs module now only has one responsibility: providing information about the environment.

• Gives better performance
  It reduces dependency-cruiser's startup time - loading the transpilers is now shifted to after checking the cache, so 100% cached runs are quite a bit faster. For normal runs there is almost no difference, though. Yet.

• Enables some new performance optimizations.
  Now there's only one entry point for the transpilers (and only one module using them), it's a lot easier to optimize that as well (will be in a separate PR or commit).

How Has This Been Tested?

• green ci
• adapted automated non-regression tests

Performance checks

Before

100% served from cache

bin/dependency-cruise.mjs src bin test configs types tools --ignore-known --cache node_modules/.cache/dependency-cruiser/load-cached --no-progress
  Time (mean ± σ):      1.184 s ±  0.014 s    [User: 1.232 s, System: 0.191 s]
  Range (min … max):    1.169 s …  1.225 s    30 runs

without a cache

 bin/dependency-cruise.mjs src bin test configs types tools --ignore-known --no-cache --no-progress
  Time (mean ± σ):      3.074 s ±  0.028 s    [User: 4.757 s, System: 0.319 s]
  Range (min … max):    3.044 s …  3.203 s    30 runs

After

100% served from cache

On my old, 4 core mac it's about 2.4x faster than before this PR:

Benchmark 1: bin/dependency-cruise.mjs src bin test configs types tools --ignore-known --cache node_modules/.cache/dependency-cruiser/load-cached --no-progress
  Time (mean ± σ):     490.1 ms ±   6.8 ms    [User: 520.5 ms, System: 113.4 ms]
  Range (min … max):   483.9 ms … 512.8 ms    30 runs

without a cache

About the same performance (the mean is 1.005x slower, but these 0.016 s are still within the σ of both runs).

bin/dependency-cruise.mjs src bin test configs types tools --ignore-known --no-cache --no-progress
  Time (mean ± σ):      3.090 s ±  0.026 s    [User: 4.804 s, System: 0.326 s]
  Range (min … max):    3.055 s …  3.176 s    30 runs

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• Documentation only change
• Refactor (non-breaking change which fixes an issue without changing functionality)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist

• 📖

  • My change doesn't require a documentation update, or ...
  • it does and I have updated it

• ⚖️

  • The contribution will be subject to The MIT license, and I'm OK with that.
  • The contribution is my own original work.
  • I am ok with the stuff in CONTRIBUTING.md.