Feature/focus_modes

[Joschi3]

Implemented new modes:

• --missing-deps-only: Skip all formatting and schema checks and only report missing dependencies (including launch/test dependencies).
• --ignore-formatting-errors: Run all critical checks while ignoring pure formatting issues like indentation or ordering. This mode is check-only and will not rewrite files.

Further improved the test coverage

[codecov-commenter]

⚠️ Please install the to ensure uploads and comments are reliably processed by Codecov.

Codecov Report

❌ Patch coverage is 87.34177% with 10 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
package_xml_validation/package_xml_validator.py	90.00%	7 Missing ⚠️
...ackage_xml_validation/helpers/pkg_xml_formatter.py	66.66%	3 Missing ⚠️

📢 Thoughts on this report? Let us know!