fix(builder): cache derived helper catalogue state

[CodeZeno]

Summary

• Cache the derived Builder helper catalogue state so searchable helper data is reused instead of rebuilt unnecessarily.
• Consolidate Builder helper handling across expressions, templates, mouse actions, and context-menu actions while preserving provider and category filtering.
• Restore the repository baseline by removing unrelated release, documentation, security, dependency, and Windows VM lab changes from this branch.

Testing

• Not run; no test results were provided.

Checklist

• I have read CONTRIBUTING.md and CODE_OF_CONDUCT.md.
• The change is focused and contains no credentials or sensitive data.
• I have added or updated relevant documentation and tests, where applicable.
• I have left changelog and version changes to maintainers unless requested.