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.

backend/apps/api/v1/serializers/accounts.py

@@ -18,6 +18,7 @@ from apps.accounts.models import (
     UserNotification,
     NotificationPreference,
 )
+from apps.core.choices.serializers import RichChoiceFieldSerializer
 
 UserModel = get_user_model()
 
@@ -190,8 +191,10 @@ class CompleteUserSerializer(serializers.ModelSerializer):
 class UserPreferencesSerializer(serializers.Serializer):
     """Serializer for user preferences and settings."""
 
-    theme_preference = serializers.ChoiceField(
-        choices=User.ThemePreference.choices, help_text="User's theme preference"
+    theme_preference = RichChoiceFieldSerializer(
+        choice_group="theme_preferences",
+        domain="accounts",
+        help_text="User's theme preference"
     )
     email_notifications = serializers.BooleanField(
         default=True, help_text="Whether to receive email notifications"
@@ -199,12 +202,9 @@ class UserPreferencesSerializer(serializers.Serializer):
     push_notifications = serializers.BooleanField(
         default=False, help_text="Whether to receive push notifications"
     )
-    privacy_level = serializers.ChoiceField(
-        choices=[
-            ("public", "Public"),
-            ("friends", "Friends Only"),
-            ("private", "Private"),
-        ],
+    privacy_level = RichChoiceFieldSerializer(
+        choice_group="privacy_levels",
+        domain="accounts",
         default="public",
         help_text="Profile visibility level",
     )
@@ -321,12 +321,9 @@ class NotificationSettingsSerializer(serializers.Serializer):
 class PrivacySettingsSerializer(serializers.Serializer):
     """Serializer for privacy and visibility settings."""
 
-    profile_visibility = serializers.ChoiceField(
-        choices=[
-            ("public", "Public"),
-            ("friends", "Friends Only"),
-            ("private", "Private"),
-        ],
+    profile_visibility = RichChoiceFieldSerializer(
+        choice_group="privacy_levels",
+        domain="accounts",
         default="public",
         help_text="Overall profile visibility",
     )
@@ -363,12 +360,9 @@ class PrivacySettingsSerializer(serializers.Serializer):
     search_visibility = serializers.BooleanField(
         default=True, help_text="Allow profile to appear in search results"
     )
-    activity_visibility = serializers.ChoiceField(
-        choices=[
-            ("public", "Public"),
-            ("friends", "Friends Only"),
-            ("private", "Private"),
-        ],
+    activity_visibility = RichChoiceFieldSerializer(
+        choice_group="privacy_levels",
+        domain="accounts",
         default="friends",
         help_text="Who can see your activity feed",
     )