feat: support for Rsbuild

[zjy040525]

Closes #244

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Diff	Package	Supply Chain Security	Vulnerability	Quality	Maintenance	License
	npm/​@​rsbuild/​core@​2.0.0

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[Copilot]

Pull request overview

Adds first-class support for running Rsbuild apps behind portless by injecting the required CLI flags (since Rsbuild doesn’t honor injected PORT/HOST env vars), and verifies the behavior via a new e2e fixture and test.

Changes:

• Add rsbuild to the framework-aware CLI flag injection list so --port/--host are appended when needed.
• Add a unit test covering injectFrameworkFlags behavior for rsbuild.
• Add an e2e Rsbuild fixture + test to validate serving through the proxy, and update the e2e proxy port allocation comment.

Reviewed changes

Copilot reviewed 8 out of 9 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
tests/e2e/src/rsbuild.test.ts	New e2e test that starts an Rsbuild dev server via portless and asserts proxy serving.
tests/e2e/src/harness.ts	Update comment documenting the allocated proxy port range to include the new test.
tests/e2e/package.json	Add @rsbuild/core so the e2e environment can run the rsbuild CLI.
tests/e2e/fixtures/rsbuild-app/src/index.ts	Add minimal entry file required for Rsbuild dev server startup.
tests/e2e/fixtures/rsbuild-app/src/index.html	Add minimal HTML template content used by the e2e assertion.
tests/e2e/fixtures/rsbuild-app/rsbuild.config.ts	Add minimal Rsbuild config pointing at the HTML template.
pnpm-lock.yaml	Lockfile updates for @rsbuild/core and transitive dependencies.
packages/portless/src/cli-utils.ts	Add rsbuild to frameworks requiring CLI port/host injection.
packages/portless/src/cli-utils.test.ts	Add unit test asserting injected args for rsbuild without --strictPort.

Files not reviewed (1)

• pnpm-lock.yaml: Language not supported

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