feat: Add digital, dry, ink, and paint brush presets; implement regression testing hooks

- Introduced new crates for digital brushes, dry media brushes, ink brushes, and paint brushes, each containing various presets.
- Updated the menus to include "Paste Special" and "Paste as New Layer" options.
- Enhanced the feature scorecard tests to validate selection texture encoding.
- Added a regression gate workflow for automated testing on push and pull requests.
- Implemented Git hooks for pre-commit checks to ensure code formatting and run tests before commits.
- Created a settings file for local configurations.

hcie-engine-api/tests/vector_creation_history.rs

@@ -43,7 +43,7 @@ fn first_vector_shape_is_one_atomic_layer_transaction() {
     assert_eq!(engine.history_len(), history_before + 1);
     assert_eq!(
         engine.history_description(history_before).as_deref(),
-        Some("Add Vector Shape")
+        Some("Add Vector Shape (Rect)")
     );
     assert_eq!(
         engine