Add support for Amazon Q chat on remote 242+

[rli]

Open issues:

• This should only be enabled on remote if 242+
• registerSchemeHandlerFactory not working correctly -- need further evaluation
• FQN WASM code doesn't seem to be invoked properly
• double check that FileEditorManager.getInstance(project).selectedFiles.first().name and editor.virtualFile.name are equivalent
• Should we just do FileEditorManager#selectedTextEditorWithRemotes? that is what inline suggestions is using
  • consolidate on decision. ChatController/FeatureDevController processInsertCodeAtCursorPosition need to be migrated too
• Figure out why error in FocusAreaContextExtractor is not surfaced anywhere

License

I confirm that my contribution is made under the terms of the Apache 2.0 license.