chore: add @since JSDoc annotations to generated types

[pavelfeldman]

Summary

• Emit @since JSDoc tags for classes and members in generated .d.ts files
• Version metadata is already present in API docs; this surfaces it in type definitions so IDEs display it on hover

[github-actions]

Test results for "tests 1"

9 flaky

⚠️ [chromium-library] › library/video.spec.ts:724 › screencast › should work with video+trace `@ubuntu-22.04-chromium-tip-of-tree`
⚠️ [chromium-page] › page/page-request-continue.spec.ts:754 › propagate headers cross origin redirect after interception `@ubuntu-22.04-chromium-tip-of-tree`
⚠️ [chromium-library] › library/beforeunload.spec.ts:130 › should support dismissing the dialog multiple times `@chromium-ubuntu-22.04-arm-node20`
⚠️ [chromium-library] › library/video.spec.ts:724 › screencast › should work with video+trace `@chromium-ubuntu-22.04-arm-node20`
⚠️ [chromium-page] › page/page-request-continue.spec.ts:754 › propagate headers cross origin redirect after interception `@chromium-ubuntu-22.04-node24`
⚠️ [chromium-library] › library/popup.spec.ts:261 › should not throw when click closes popup `@chromium-ubuntu-22.04-node20`
⚠️ [chromium-library] › library/video.spec.ts:481 › screencast › should capture static page in persistent context @smoke `@chromium-ubuntu-22.04-node20`
⚠️ [firefox-page] › page/page-request-gc.spec.ts:19 › should work `@firefox-ubuntu-22.04-node20`
⚠️ [webkit-page] › page/page-set-input-files.spec.ts:38 › should upload a folder `@webkit-ubuntu-22.04-node20`

39105 passed, 846 skipped

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Merge workflow run.

[github-actions]

Test results for "MCP"

1 failed
❌ [msedge] › mcp/files.spec.ts:106 › clicking on download link emits download @mcp-windows-latest

6295 passed, 360 skipped

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Merge workflow run.