feat: wsgi server

[Dario Valdespino (darvld)]

Summary

This PR introduces a new feature for elide serve: the ability to use Elide as a WSGI server, with verified drop-in compatibility for Flask (without Elide's custom Flask intrinsics). The server fully implements the minimal requirements of specification and will be extended over time with additional features.

Applications running on Elide WSGI have full access to Elide APIs, allowing them to access secrets, make LLM calls, and run JS code to render React server-side.

Depends on #1709

[codecov]

Codecov Report

❌ Patch coverage is 6.13288% with 551 lines in your changes missing coverage. Please review.
✅ Project coverage is 39.65%. Comparing base (cd30fef) to head (e974458).
⚠️ Report is 59 commits behind head on main.

Files with missing lines	Patch %	Lines
.../intrinsics/server/http/v2/wsgi/WsgiInputStream.kt	0.00%	127 Missing ⚠️
.../intrinsics/server/http/v2/wsgi/ElideWsgiServer.kt	0.00%	102 Missing ⚠️
...lin/elide/runtime/exec/ContextAwareExecutorBase.kt	8.24%	89 Missing ⚠️
.../intrinsics/server/http/v2/wsgi/WsgiErrorStream.kt	0.00%	58 Missing ⚠️
...rinsics/server/http/v2/flask/FlaskHttpIntrinsic.kt	7.84%	47 Missing ⚠️
...kotlin/elide/tool/cli/cmd/repl/ToolShellCommand.kt	14.89%	35 Missing and 5 partials ⚠️
.../intrinsics/server/http/v2/wsgi/WsgiHttpContext.kt	0.00%	37 Missing ⚠️
...otlin/elide/runtime/exec/ContextAwareDispatcher.kt	0.00%	16 Missing ⚠️
...src/main/kotlin/elide/runtime/exec/ContextLocal.kt	30.00%	7 Missing ⚠️
...e/tooling/project/manifest/ElidePackageManifest.kt	0.00%	7 Missing ⚠️
... and 8 more

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1710      +/-   ##
==========================================
- Coverage   40.36%   39.65%   -0.72%     
==========================================
  Files         883      892       +9     
  Lines       40893    37411    -3482     
  Branches     5662     5760      +98     
==========================================
- Hits        16507    14835    -1672     
+ Misses      22449    20632    -1817     
- Partials     1937     1944       +7     

Flag	Coverage Δ
jvm	39.65% <6.13%> (-0.72%)	⬇️
lib	39.65% <6.13%> (-0.72%)	⬇️

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

Files with missing lines	Coverage Δ
...time/gvm/intrinsics/BuildTimeIntrinsicsResolver.kt	100.00% <100.00%> (ø)
...ain/kotlin/elide/tool/cli/options/ServerOptions.kt	50.00% <0.00%> (-3.34%)	⬇️
...rc/main/kotlin/elide/runtime/exec/PinnedContext.kt	0.00% <0.00%> (ø)
...lin/elide/runtime/core/InternalRuntimeException.kt	0.00% <0.00%> (ø)
.../main/kotlin/elide/runtime/core/RuntimeExecutor.kt	60.00% <60.00%> (ø)
...de/runtime/intrinsics/server/http/v2/HttpServer.kt	8.10% <50.00%> (ø)
.../kotlin/elide/runtime/exec/ContextAwareExecutor.kt	25.00% <25.00%> (ø)
...main/kotlin/elide/runtime/plugins/python/Python.kt	75.75% <55.55%> (+4.60%)	⬆️
...sics/server/http/v2/guest/GuestIteratorProducer.kt	0.00% <0.00%> (ø)
...src/main/kotlin/elide/runtime/exec/ContextLocal.kt	30.00% <30.00%> (ø)
... and 9 more

... and 585 files with indirect coverage changes

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[Dario Valdespino (darvld)]

Converting back to draft for now, possibly superseded by an upcoming PR

[Dario Valdespino (darvld)]

superseded by #1736