fix: vfs perf

[sgammon]

Summary

Fixes various issues related to VFS. More coming soon; depends on #1331. Also fixes Python import issues at main.

[codecov]

Codecov Report

Attention: Patch coverage is 72.68908% with 130 lines in your changes missing coverage. Please review.

Project coverage is 51.94%. Comparing base (53faf97) to head (6309424).
Report is 9 commits behind head on main.

Files with missing lines	Patch %	Lines
...in/elide/runtime/plugins/AbstractLanguagePlugin.kt	59.21%	31 Missing ⚠️
.../runtime/gvm/internals/vfs/EmbeddedGuestVFSImpl.kt	61.90%	12 Missing and 4 partials ⚠️
...main/kotlin/elide/runtime/plugins/vfs/VfsPlugin.kt	57.69%	8 Missing and 3 partials ⚠️
...main/kotlin/elide/runtime/plugins/python/Python.kt	30.76%	8 Missing and 1 partial ⚠️
...main/kotlin/elide/runtime/plugins/env/EnvPlugin.kt	52.63%	7 Missing and 2 partials ⚠️
...elide/runtime/gvm/internals/vfs/AbstractBaseVFS.kt	22.22%	7 Missing ⚠️
...kotlin/elide/runtime/gvm/internals/vfs/VFSTypes.kt	53.33%	1 Missing and 6 partials ⚠️
...kotlin/elide/tool/cli/cmd/repl/ToolShellCommand.kt	70.00%	3 Missing and 3 partials ⚠️
...ages/cli/src/main/kotlin/elide/tool/cli/Statics.kt	50.00%	4 Missing ⚠️
.../graalvm/python/embedding/GraalPythonFilesystem.kt	0.00%	4 Missing ⚠️
... and 13 more

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1332      +/-   ##
==========================================
- Coverage   52.02%   51.94%   -0.08%     
==========================================
  Files         472      475       +3     
  Lines       18324    18786     +462     
  Branches     3407     3487      +80     
==========================================
+ Hits         9533     9759     +226     
- Misses       7679     7880     +201     
- Partials     1112     1147      +35     

Flag	Coverage Δ
jvm	51.94% <72.68%> (-0.08%)	⬇️
lib	51.94% <72.68%> (-0.08%)	⬇️

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

Files with missing lines	Coverage Δ
...ide/runtime/gvm/internals/EngineThreadContext.java	0.00% <ø> (ø)
...src/main/kotlin/elide/runtime/core/EnginePlugin.kt	100.00% <ø> (ø)
.../kotlin/elide/runtime/diag/DiagnosticsContainer.kt	38.59% <100.00%> (ø)
...in/elide/runtime/plugins/AbstractLanguageConfig.kt	56.75% <100.00%> (ø)
...me/lang/javascript/ElideUniversalJsModuleLoader.kt	74.90% <ø> (ø)
...elide/runtime/gvm/kotlin/feature/KotlinResource.kt	0.00% <ø> (ø)
...otlin/elide/runtime/plugins/python/PythonConfig.kt	100.00% <100.00%> (ø)
...e/lang/typescript/TypeScriptPrecompiledLoader.java	68.49% <ø> (-3.44%)	⬇️
...m/internals/intrinsics/js/abort/AbortIntrinsics.kt	100.00% <100.00%> (ø)
...e/gvm/internals/intrinsics/js/abort/AbortSignal.kt	84.81% <100.00%> (+0.59%)	⬆️
... and 53 more

... and 11 files with indirect coverage changes

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