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-lock.json

@@ -1,12 +1,12 @@
 {
   "name": "@zereight/mcp-gitlab",
-  "version": "1.0.62",
+  "version": "1.0.64",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "@zereight/mcp-gitlab",
-      "version": "1.0.62",
+      "version": "1.0.64",
       "license": "MIT",
       "dependencies": {
         "@modelcontextprotocol/sdk": "1.8.0",