Enhance README with usage and functionality details (#2237)

Expanded the README to provide detailed usage instructions, functionality, and use cases for the Clone User script.

Author: ChaseMillers

Server-Side Components/Background Scripts/Clone User with Roles and Groups/README.md

@@ -1,2 +1,29 @@
 # Clone User with Roles and Groups
-I have created a script in ServiceNow to replicate a user's profile. This script not only duplicates the user's data but also replicates the roles and groups assigned to that user.
+
+A background script that clones an existing user's profile including all their roles and group memberships to a new user account.
+
+## Usage
+
+1. Navigate to **System Definition → Scripts - Background**
+2. Copy and paste the script content
+3. Update the function call at the bottom with the source and target user IDs:
+   ```javascript
+   cloneUser('source.username', 'new.username');
+   ```
+4. Click "Run script"
+
+## What It Does
+
+The script:
+1. Creates a new user record with the specified username
+2. Copies all field values from the source user to the new user (except fields already set)
+3. Clones all directly assigned roles (excludes inherited roles)
+4. Clones all group memberships
+5. Returns the sys_id of the newly created user
+
+## Use Cases
+
+- Onboarding new team members with similar access needs
+- Creating test users with specific role/group combinations
+- Setting up backup user accounts with identical permissions
+- Standardizing user setup based on role templates