Add comprehensive API documentation for ThrillWiki integration and features

- Introduced Next.js integration guide for ThrillWiki API, detailing authentication, core domain APIs, data structures, and implementation patterns.
- Documented the migration to Rich Choice Objects, highlighting changes for frontend developers and enhanced metadata availability.
- Fixed the missing `get_by_slug` method in the Ride model, ensuring proper functionality of ride detail endpoints.
- Created a test script to verify manufacturer syncing with ride models, ensuring data integrity across related models.

.claude/settings.local.json

@@ -0,0 +1,12 @@
+{
+  "permissions": {
+    "allow": [
+      "Bash(python manage.py check:*)",
+      "Bash(uv run:*)",
+      "Bash(find:*)",
+      "Bash(python:*)"
+    ],
+    "deny": [],
+    "ask": []
+  }
+}