Feature/DAIP2-2112 implement pre commit hooks
* Add pre-commit hooks for local code quality checks
Adds .pre-commit-config.yaml with file hygiene hooks (trailing-whitespace,
end-of-file-fixer, check-yaml/json, check-merge-conflict, check-added-large-files)
plus local hooks for black and mypy on pre-commit and pytest on pre-push.
Includes setup documentation and adds pre-commit to dev dependencies.
Auto-fixed trailing whitespace and missing newlines caught by the new hooks.
* Add sample pre-commit hook for testing purposes
* Add test file for pre-commit hook validation
* Remove test file for pre-commit hook validation
* Merged DEV into feature/DAIP2-2112-implement-pre-commit-hooks---
* Merged DEV into feature/DAIP2-2112-implement-pre-commit-hooks---
* Move to documentation
Approved-by: Katon Minhas
Sujit Deokar