Add ability to limit the classes that actually get compiled

[ascopes]

This enables passing classes to compile to the .compile method as explicit arguments,
should the user decide they want to do this.

[github-actions]

Test Results

  1 448 files  ±    0    1 448 suites  ±0   0s ⏱️ ±0s
18 272 tests +234  18 272 ✔️ +234  0 💤 ±0  0 ❌ ±0 
18 558 runs  +234  18 558 ✔️ +234  0 💤 ±0  0 ❌ ±0 

Results for commit 37890df. ± Comparison against base commit e5aca93.

[codecov-commenter]

Codecov Report

Merging #266 (37890df) into main (e5aca93) will increase coverage by 0.02%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main     #266      +/-   ##
==========================================
+ Coverage   70.89%   70.92%   +0.02%     
==========================================
  Files          72       72              
  Lines        2536     2538       +2     
  Branches      237      237              
==========================================
+ Hits         1798     1800       +2     
  Misses        671      671              
  Partials       67       67              

Impacted Files	Coverage Δ
...b/ascopes/jct/compilers/impl/JctJsr199Interop.java	100.00% <ø> (ø)
...hub/ascopes/jct/compilers/AbstractJctCompiler.java	100.00% <100.00%> (ø)
...a/io/github/ascopes/jct/compilers/JctCompiler.java	100.00% <100.00%> (ø)