feat: enhance Makefile with code quality commands and default help (#25655)

Makefile

 API_IMAGE=$(DOCKER_REGISTRY)/dify-api
 VERSION=latest
 
+# Default target - show help
+.DEFAULT_GOAL := help
+
 # Backend Development Environment Setup
 .PHONY: dev-setup prepare-docker prepare-web prepare-api
 
-# Default dev setup target
+# Dev setup target
 dev-setup: prepare-docker prepare-web prepare-api
 	@echo "✅ Backend development environment setup complete!"
 
 	@rm -rf api/storage
 	@echo "✅ Cleanup complete"
 
+# Backend Code Quality Commands
+format:
+	@echo "🎨 Running ruff format..."
+	@uv run --project api --dev ruff format ./api
+	@echo "✅ Code formatting complete"
+
+check:
+	@echo "🔍 Running ruff check..."
+	@uv run --project api --dev ruff check ./api
+	@echo "✅ Code check complete"
+
+lint:
+	@echo "🔧 Running ruff format and check with fixes..."
+	@uv run --directory api --dev sh -c 'ruff format ./api && ruff check --fix ./api'
+	@echo "✅ Linting complete"
+
+type-check:
+	@echo "📝 Running type check with basedpyright..."
+	@uv run --directory api --dev basedpyright
+	@echo "✅ Type check complete"
+
 # Build Docker images
 build-web:
 	@echo "Building web Docker image: $(WEB_IMAGE):$(VERSION)..."
 	@echo "  make prepare-api    - Set up API environment"
 	@echo "  make dev-clean      - Stop Docker middleware containers"
 	@echo ""
+	@echo "Backend Code Quality:"
+	@echo "  make format         - Format code with ruff"
+	@echo "  make check          - Check code with ruff"
+	@echo "  make lint           - Format and fix code with ruff"
+	@echo "  make type-check     - Run type checking with basedpyright"
+	@echo ""
 	@echo "Docker Build Targets:"
 	@echo "  make build-web      - Build web Docker image"
 	@echo "  make build-api      - Build API Docker image"
 	@echo "  make build-push-all - Build and push all Docker images"
 
 # Phony targets
-.PHONY: build-web build-api push-web push-api build-all push-all build-push-all dev-setup prepare-docker prepare-web prepare-api dev-clean help
+.PHONY: build-web build-api push-web push-api build-all push-all build-push-all dev-setup prepare-docker prepare-web prepare-api dev-clean help format check lint type-check