docs(standards): vendor template into MCP bundle; add component tools + start_app prompt

standards/mcp/templates/app/pipelines/example/__init__.py

@@ -0,0 +1,7 @@
+"""# Summary
+
+Example pipeline family — a reusable skeleton, not an app-specific pipeline.
+
+Replace ``Example*`` names and the three stages with your family's stages. The
+shape (abc → impl → pipeline.yaml → resources/) stays the same.
+"""