FEATURE: Add scopes to API keys (#9844)

* Added scopes UI

* Create scopes when creating a new API key

* Show scopes on the API key show route

* Apply scopes on API requests

* Extend scopes from plugins

* Add missing scopes. A mapping can be associated with multiple controller actions

* Only send scopes if the use global key option is disabled. Use the discourse plugin registry to add new scopes

* Add not null validations and index for api_key_id

* Annotate model

* DEV: Move default mappings to ApiKeyScope

* Remove unused attribute and improve UI for existing keys

* Support multiple parameters separated by a comma

lib/discourse_plugin_registry.rb

@@ -78,6 +78,8 @@ class DiscoursePluginRegistry
 
   define_filtered_register :topic_thumbnail_sizes
 
+  define_filtered_register :api_key_scope_mappings
+
   def self.register_auth_provider(auth_provider)
     self.auth_providers << auth_provider
   end