chore: add tests, update docs and actions (#299)

* docs: update documentation

* feat: validate-inputs has it's own pyproject

* security: mask DOCKERHUB_PASSWORD

* chore: add tokens, checkout, recrete docs, integration tests

* fix: add `statuses: write` permission to pr-lint

validate-inputs/tests/test_pre-commit_custom.py

@@ -4,8 +4,8 @@ Generated by generate-tests.py - Do not edit manually.
 """
 # pylint: disable=invalid-name  # Test file name matches action name
 
-from pathlib import Path
 import sys
+from pathlib import Path
 
 # Add action directory to path to import custom validator
 action_path = Path(__file__).parent.parent.parent / "pre-commit"