docs: update README and version to 1.0.64

🚀 Breaking Changes:
- Updated version from 1.0.63 to 1.0.64
- Added cookie-based authentication details in README

📝 Details:
- Enhanced Docker instructions in README
- Updated package-lock.json and package.json with new version

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@zereight/mcp-gitlab",
-  "version": "1.0.63",
+  "version": "1.0.64",
   "description": "MCP server for using the GitLab API",
   "license": "MIT",
   "author": "zereight",