refactor: rename cs-ai-agent to agent-desk in SDK and related files

- Updated message types in support-host-bridge.ts to use agent-desk prefix.
- Added new agent-desk-sdk.min.js file with updated functionality.
- Removed old cs-ai-agent-sdk.min.js file.
- Modified build-sdk script to generate agent-desk-sdk.min.js.
- Changed scrollbar class names in main.scss from cs-ai-agent to agent-desk.

web/components/support-chat/message-list.tsx

@@ -219,7 +219,7 @@ export const SupportChatMessageList = forwardRef<SupportChatMessageListHandle, S
     return (
       <div
         ref={containerRef}
-        className="cs-ai-agent-scrollbar flex min-h-0 flex-1 flex-col gap-4 overflow-y-auto px-4 py-4"
+        className="agent-desk-scrollbar flex min-h-0 flex-1 flex-col gap-4 overflow-y-auto px-4 py-4"
       >
         <div ref={contentRef} className="flex flex-col gap-4">
           {hasMoreOlder && onLoadOlder ? (