feat: add qqbot chat channel (#16140)

### What problem does this PR solve?
Adds qqbot as a built-in chat channel so it can be discovered and
started by the channel bootstrapper and shown in the chat channel
settings UI.

### Type of change
- [x] New Feature (non-breaking change which adds functionality)

web/src/pages/user-setting/chat-channel/index.tsx

@@ -63,7 +63,8 @@ const ChatChannel = () => {
           ChatChannelKey.DISCORD,
           ChatChannelKey.FEISHU,
           ChatChannelKey.TELEGRAM,
-        ].includes(id), // Show only Discord and Feishu
+          ChatChannelKey.QQBOT,
+        ].includes(id), // Show only selected chat channels
     )
     .map((id) => ({
       id,