fix(extensions): fix gitignore template and bump version (#38614)

superset-extensions-cli/src/superset_extensions_cli/templates/gitignore.j2

@@ -0,0 +1,36 @@
+# Dependencies
+node_modules/
+
+# Build outputs
+dist/
+*.supx
+
+# Python
+__pycache__/
+*.py[cod]
+*$py.class
+*.egg-info/
+.eggs/
+*.egg
+.venv/
+venv/
+env/
+ENV/
+
+# IDE
+.idea/
+.vscode/
+*.swp
+*.swo
+
+# OS
+.DS_Store
+Thumbs.db
+
+# Logs
+*.log
+npm-debug.log*
+
+# Environment
+.env
+.env.local