test(controller): Add test for controller documentation coverage

[karangattu]

The key changes include enhancements to the documentation configuration, updates to test coverage, and improvements to method implementations for better functionality and maintainability.

Documentation updates:

• Added new controllers InputBookmarkButton and PageNavbar to the documentation configuration in docs/_quartodoc-testing.yml. This ensures these controllers are now included in the generated documentation.

Functional improvements:

• Updated the expect_class_state method in shiny/playwright/controller/_output.py to consistently include the timeout parameter in all expect_cell_class calls, improving flexibility and consistency.

Test enhancements:

• Added assertions in test_validate_row_selection_in_edit_mode to ensure proper row focus and cell state after exiting edit mode, improving the robustness of the test.
• Introduced a new test file tests/pytest/test_controller_documentation.py to validate that all controller classes are documented and that no extraneous entries exist in the documentation configuration. This ensures alignment between the codebase and the documentation.

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Scenario 1: Developer forgets to document it in the testing docs

Code has: Card, Accordion, InputBookmarkButton
Docs have: Card, Accordion

Test fails with:

Controllers missing from docs/_quartodoc-testing.yml:
  - playwright.controller.InputBookmarkButton

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Scenario 2: Developer makes a typo in docs

Code has: Card, Accordion, InputBookmarkButton
Docs have: Card, Accordion, InputBookmarkButto

Controllers missing from docs/_quartodoc-testing.yml:
  - playwright.controller.InputBookmarkButton

Extraneous classes in docs/_quartodoc-testing.yml:
  - playwright.controller.InputBookmarkButto

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