chore: update .gitignore with standard patterns

Add patterns for node_modules, build output, logs, editor files,
OS files, environment files, and test coverage.

gsd-framework/.gitignore

@@ -1 +1,34 @@
-settings.local.json
+# Dependencies
+node_modules/
+
+# Build output
+dist/
+dist-ssr/
+*.local
+
+# Logs
+logs/
+*.log
+npm-debug.log*
+
+# Editor directories and files
+.vscode/
+.idea/
+*.swp
+*.swo
+*~
+
+# OS files
+.DS_Store
+Thumbs.db
+
+# Environment files
+.env
+.env.*
+!.env.example
+
+# Test coverage
+coverage/
+
+# Claude Code local settings
+settings.local.json