feat: lazy jar parsing, indexer internals

[sgammon]

• feat(java): parse jars lazily to avoid strong initial overhead
• feat(indexer): implement indexer internals for jars
• test(java): add benchmarks for jar reading
• fix: relative imports should use .js

[codecov]

Codecov Report

Attention: Patch coverage is 70.99768% with 125 lines in your changes are missing coverage. Please review.

Project coverage is 91.11%. Comparing base (e0ed7ab) to head (3ba4ef6).

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #71      +/-   ##
==========================================
- Coverage   94.60%   91.11%   -3.50%     
==========================================
  Files          28       28              
  Lines        5712     5897     +185     
  Branches      382      363      -19     
==========================================
- Hits         5404     5373      -31     
- Misses        304      518     +214     
- Partials        4        6       +2     

Flag	Coverage Δ
packages	91.11% <70.99%> (-3.50%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files	Coverage Δ
packages/java/java-classfile.ts	97.03% <100.00%> (-0.90%)	⬇️
packages/java/java-home.ts	95.16% <100.00%> (ø)
packages/java/javaclasses/constant-pool.ts	94.54% <100.00%> (ø)
packages/java/javaclasses/instruction-parser.ts	76.64% <100.00%> (ø)
packages/java/javaclasses/java-class-reader.ts	79.97% <100.00%> (-16.00%)	⬇️
packages/java/toolchain/abstract.ts	97.30% <100.00%> (ø)
packages/java/toolchain/compiler.ts	100.00% <100.00%> (ø)
packages/java/toolchain/index.ts	100.00% <100.00%> (ø)
packages/java/toolchain/launcher.ts	100.00% <100.00%> (ø)
packages/java/toolchain/repositories.ts	100.00% <100.00%> (ø)
... and 5 more

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