refactor: add "empty" and "not empty" options to checkbox field linkage conditions (#7073)

packages/core/client/src/collection-manager/interfaces/properties/operators.ts

@@ -242,6 +242,8 @@ export const boolean = [
       },
     },
   },
+  { label: "{{ t('is empty') }}", value: '$empty', noValue: true },
+  { label: "{{ t('is not empty') }}", value: '$notEmpty', noValue: true },
 ];
 
 export const tableoid = [