3567558: Add language context management for Config Pages in Mercury Editor

Travis Tomkarequested to merge
issue/me_config_pages-3567558:3567558-support-language-context into 1.0.x
  • Implement ConfigPagesContextManager for language context handling
  • Inject context manager into relevant classes
  • Update MercuryEditorConfigPagesForm to utilize language context
  • Add routing for switching language context in Config Pages
  • Enhance classInit method to handle language context during entity loading
  • Override language context links in the form for Mercury Editor compatibility

Closes #3567558

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