feat: restructured build method to return a permissions object

The build method has been revamped to return a detailed permissions object instead of an array of strings. This enhancement allows for a more structured and accessible representation of permissions. Updated tests reflect the new return type and validate the object structure, ensuring each action is correctly mapped to its permissions.

BREAKING CHANGE: Changed the return type of the build method from an array to an object, affecting how permissions are retrieved and processed. Increment version to 2.0.0.

package.json

@@ -1,6 +1,6 @@
 {
   "name": "granular-ac",
-  "version": "1.0.0",
+  "version": "2.0.0",
   "description": "Granular Access Control library for managing permissions.",
   "main": "dist/index.js",
   "types": "types/index.d.ts",