feat(webhook): add Apprise webhook support and rename bot-webhook to discord-webhook

- Rename the Discord webhook endpoint from `/bot-webhook/` to `/discord-webhook/` for better clarity.
- Add new routes and controller methods (`receiveApprise`, `receiveAppriseNotify`) to support Apprise integrations.
- Implement `mapApprisePayload` in TalkService to map Apprise JSON format (title, body, type, attachments) to Talk message format.
- Update the settings UI to generate and display URLs for both Discord and Apprise webhooks.
- Update `INSTALL.md` and `README.md` documentation to reflect the new webhook paths and Apprise support.
- Refactor token revocation logic to revoke all tokens for a room at once.

appinfo/routes.php

@@ -4,7 +4,7 @@ return [
     'routes' => [
         [
             'name' => 'webhook#receive',
-            'url' => '/bot-webhook/{roomToken}/{token}',
+            'url' => '/discord-webhook/{roomToken}/{token}',
             'verb' => 'POST',
         ],
         [
@@ -28,5 +28,15 @@ return [
             'verb' => 'GET',
             'type' => 'noCsrf',
         ],
+        [
+            'name' => 'webhook#receiveApprise',
+            'url' => '/apprise-webhook/{roomToken}/{token}',
+            'verb' => 'POST',
+        ],
+        [
+            'name' => 'webhook#receiveAppriseNotify',
+            'url' => '/apprise-webhook/{roomToken}/notify/{token}',
+            'verb' => 'POST',
+        ],
     ],
 ];