docs: add pullbasectl users delete command

guides/pullbasectl.mdx

@@ -147,7 +147,7 @@ docker compose exec central-server pullbasectl servers install-script \
 </Step>
 </Steps>
 
-### Create/List Users
+### Create/List/Delete Users
 
 Manage access for your team.
 
@@ -162,8 +162,18 @@ docker compose exec central-server pullbasectl users create \
   --new-username "auditor" \
   --new-password "AuditPass123!" \
   --role viewer
+
+# Delete a user's account
+docker compose exec central-server pullbasectl users delete \
+  --server-url http://localhost:8080 \
+  --user-id 7 \
+  --delete-acct-username "SomeAccount123"
 ```
 
+<Tip>
+User deletion is blocked if you attempt to delete the last active admin or your own account.
+</Tip>
+
 ### Validate Config Locally
 
 Validate your `config.yaml` before pushing to Git to prevent errors.

reference/cli.mdx

@@ -729,9 +729,28 @@ pullbasectl users list \
   --limit 50
 ```
 
-<Info>
-User deletion currently requires the web UI or the REST API (`DELETE /api/v1/users/{userID}`). CLI support is planned.
-</Info>
+### `pullbasectl users delete`
+
+Delete a user account.
+
+<ParamField flag="--user-id" type="integer" required>
+ID of the user to delete.
+</ParamField>
+<ParamField flag="--delete-acct-username" type="string" required>
+Username of the account to delete (used as confirmation).
+</ParamField>
+
+<Note>
+Deletion is blocked if you attempt to delete the last active admin or your own account. The `--delete-acct-username` flag serves as confirmation and must match the username associated with the user ID.
+</Note>
+
+```bash
+pullbasectl users delete \
+  --server-url http://localhost:8080 \
+  --admin-token $ADMIN_JWT \
+  --user-id 7 \
+  --delete-acct-username "SomeAccount123"
+```
 
 ## Bootstrap wizard (interactive)