fix(lint): resolve action-validator failure on language-version-detect

- Remove unsupported `deprecated: true` from language-version-detect/action.yml
  (deprecation already communicated via description field)
- Scope action-validator pre-commit hook to workflow and action.yml files only
- Make missing pre-commit a hard error in lint-actions target

.pre-commit-config.yaml

@@ -99,3 +99,4 @@ repos:
     rev: v0.8.0
     hooks:
       - id: action-validator
+        files: '(^\.github/workflows/.*\.ya?ml$|.*/action\.ya?ml$)'

Makefile

@@ -332,7 +332,8 @@ lint-actions: ## Validate GitHub Actions workflows and action.yml files
 			exit 1; \
 		fi; \
 	else \
-		echo "$(YELLOW)⚠️ pre-commit not found, skipping action-validator$(RESET)"; \
+		echo "$(RED)❌ pre-commit not found. Install it via 'make install-tools' before linting$(RESET)"; \
+		exit 1; \
 	fi
 
 # Check targets

language-version-detect/action.yml

@@ -5,7 +5,6 @@
 name: Language Version Detect
 description: 'DEPRECATED: This action is deprecated. Inline version detection directly in your actions instead. Detects language version from project configuration files with support for PHP, Python, Go, and .NET.'
 author: 'Ismo Vuorinen'
-deprecated: true
 
 branding:
   icon: code