feat(git-hooks): implement conditional Husky activation system

- Implements conditional activation logic in husky.sh helper script
- Updates pre-commit hook to run linting only when enabled
- Updates commit-msg hook to validate messages only when enabled
- Adds .husky-enabled to .gitignore for user-specific activation
- Creates user activation instructions in .husky/README.md
- Provides graceful fallback when hooks are disabled

Activation: Environment variable, local file, or global config
Hooks: Pre-commit (linting) and commit-msg (validation)
Behavior: Optional activation with helpful instructions when disabled

.gitignore

@@ -141,4 +141,5 @@ electron/out/
 android/.gradle/file-system.probe
 android/.gradle/caches/
 
-coverage/
+coverage/
+.husky-enabled