Define permissions on PluginDeclaration (#988)

Adds a permissions array to PluginDeclaration, a type-level Permissions
registry that plugins extend with module augmentation, and
registerPluginPermissions() called from all entrypoints. checkPermission
and the web UI hasPermission helpers now take PermissionName so typos are
compile errors. Core definitions move into a corePermissions array that
the interface derives its keys from.

Closes #987

Co-authored-by: Claude Fable 5.1 <noreply@anthropic.com>
Co-authored-by: Cooldude2606 <25043174+Cooldude2606@users.noreply.github.com>

packages/controller/src/ControlConnection.ts

@@ -169,7 +169,7 @@ export default class ControlConnection extends BaseConnection {
 		}
 
 		if (typeof permission === "string") {
-			this.user.checkPermission(permission);
+			this.user.checkPermission(permission as lib.PermissionName);
 			return;
 		}