chore(bidi): add support for the input.fileDialogOpened event

[hbenl]

Fixes the following tests in Firefox:

• tests/library/capabilities.spec.ts:
  • "should not crash when clicking a label with a "
• tests/page/page-filechooser.spec.ts:
  • "should upload multiple large files"
  • "should emit event once"
  • "should emit event via prepend"
  • "should emit event on/off"
  • "should emit event addListener/removeListener"
  • "should work when file input is attached to DOM"
  • "should work when file input is not attached to DOM"
  • "should not throw when filechooser belongs to iframe"
  • "should work with no timeout"
  • "should return the same file chooser when there are many watchdogs simultaneously"
  • "should accept single file"
  • "should be able to read selected file"
  • "should work for single file pick"
  • "should work for "multiple""
  • "should work for "webkitdirectory""
  • "should emit event after navigation"
  • "should trigger listener added before navigation"

[github-actions]

Test results for "MCP"

2432 passed, 116 skipped

---

Merge workflow run.

[github-actions]

Test results for "tests 1"

1 failed
❌ [playwright-test] › reporter.spec.ts:251 › merged › should not have internal error when steps are finished after timeout @macos-latest-node18-2

1 flaky

⚠️ [firefox-library] › library/inspector/cli-codegen-1.spec.ts:1079 › cli codegen › should not throw csp directive violation errors `@firefox-ubuntu-22.04-node18`

40313 passed, 787 skipped

---

Merge workflow run.