[wip] feat: implement web streams

[sgammon]

Summary

• feat: streams v2 / drop polyfills runtime#379

Implements types like ReadableStream and WritableStream from the Web Streams API. This is our last remaining suite of polyfilled types, so this PR also begins to eliminate infra around our polyfills.

• ReadableStream
  • ReadableStreamSource
  • ReadableByteStreamController
  • ReadableStreamDefaultController
• WritableStream
• TransformStream

[codecov]

Codecov Report

Attention: Patch coverage is 20.20202% with 79 lines in your changes missing coverage. Please review.

Project coverage is 52.80%. Comparing base (c00e776) to head (5e40656).
Report is 10 commits behind head on main.

Files with missing lines	Patch %	Lines
...ls/intrinsics/js/webstreams/WebStreamsIntrinsic.kt	20.00%	52 Missing ⚠️
...tlin/elide/runtime/intrinsics/js/ReadableStream.kt	0.00%	8 Missing ⚠️
...e/runtime/intrinsics/js/stream/StreamSourceType.kt	0.00%	8 Missing ⚠️
.../runtime/gvm/internals/vfs/EmbeddedGuestVFSImpl.kt	33.33%	1 Missing and 1 partial ⚠️
...trinsics/js/stream/ReadableByteStreamController.kt	0.00%	2 Missing ⚠️
...nsics/js/stream/ReadableStreamDefaultController.kt	0.00%	2 Missing ⚠️
...main/kotlin/elide/runtime/plugins/js/JavaScript.kt	50.00%	1 Missing and 1 partial ⚠️
...in/elide/runtime/plugins/AbstractLanguagePlugin.kt	0.00%	1 Missing ⚠️
...ntime/intrinsics/js/stream/CountQueuingStrategy.kt	0.00%	1 Missing ⚠️
...ntime/intrinsics/js/stream/ReadableStreamSource.kt	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1214      +/-   ##
==========================================
- Coverage   53.16%   52.80%   -0.37%     
==========================================
  Files         429      434       +5     
  Lines       17242    17296      +54     
  Branches     3125     3107      -18     
==========================================
- Hits         9167     9133      -34     
- Misses       7055     7138      +83     
- Partials     1020     1025       +5     

Flag	Coverage Δ
jvm	52.80% <20.20%> (-0.37%)	⬇️
lib	52.80% <20.20%> (-0.37%)	⬇️

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

Files with missing lines	Coverage Δ
...otlin/elide/runtime/plugins/js/JavaScriptConfig.kt	96.55% <100.00%> (+1.20%)	⬆️
...tlin/elide/runtime/plugins/js/JavaScriptVersion.kt	92.30% <100.00%> (+0.64%)	⬆️
...in/elide/runtime/plugins/AbstractLanguagePlugin.kt	0.00% <0.00%> (ø)
...ntime/intrinsics/js/stream/CountQueuingStrategy.kt	0.00% <0.00%> (ø)
...ntime/intrinsics/js/stream/ReadableStreamSource.kt	0.00% <0.00%> (ø)
.../runtime/gvm/internals/vfs/EmbeddedGuestVFSImpl.kt	68.64% <33.33%> (-1.91%)	⬇️
...trinsics/js/stream/ReadableByteStreamController.kt	0.00% <0.00%> (ø)
...nsics/js/stream/ReadableStreamDefaultController.kt	0.00% <0.00%> (ø)
...main/kotlin/elide/runtime/plugins/js/JavaScript.kt	83.18% <50.00%> (-9.95%)	⬇️
...tlin/elide/runtime/intrinsics/js/ReadableStream.kt	0.00% <0.00%> (ø)
... and 2 more

... and 6 files with indirect coverage changes

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