Add flagged state to the current pywikibot basepage to get information about the flagging status of the given page.

Implementation

• create flagged_revision() method in pywikibot.basepage to return flagged state of a page
• use FlaggedRevs extension to get pages that has flagged revisions and return flagged state with flagged_state() method

Code Review Requirements:

For the patch to pass Pywikibot code review, please ensure:

Follow Gerrit guidelines:

• Manual:Pywikibot/Gerrit - For_developers
• Gerrit: Commit message guidelines
• See also: T407059 (Pywikibot contribution how-to documentation)

Code quality:

• Patch must follow the Pywikibot style guide
• No flake8 errors or warnings
• Commit message must follow style guidelines

Testing:

• Added error handling must include unit tests
• Tests should verify proper error detection and messaging for OAuth/BotPassword scenarios