update makefile and remove empty test file

Makefile

@@ -4,16 +4,25 @@ help:
 	@echo "Available commands:"
 	@echo " 	install       		Install dependencies"
 	@echo " 	test          		Run tests"
+	@echo " 	test <file>   		Run specific test file"
 	@echo " 	lint          		Run linting"
 	@echo " 	format        		Format code"
 	@echo " 	clean         		Clean build artifacts"
 	@echo " 	build         		Build package"
+	@echo " 	run           		Start the KiCad MCP server"
 
 install:
 	uv sync --group dev
 
 test:
-	uv run python -m pytest tests/ -v
+	# Collect extra args; if none, use tests/
+	@files="$(filter-out $@,$(MAKECMDGOALS))"; \
+	if [ -z "$$files" ]; then files="tests/"; fi; \
+	uv run pytest $$files -v
+
+# Prevent “No rule to make target …” errors for the extra args
+%::
+	@:
 
 lint:
 	uv run ruff check kicad_mcp/ tests/