Gmail send, archive and delete (#573)

* added send, archive and delete

* fix scopes

* added replyall, cc, bcc etc

* - Added scope-aware Gmail status via gmail:getConnectionStatus, so the email empty state can
    distinguish “not connected” from “connected but missing new Gmail scope.”
  - Hardened Gmail send header construction against CR/LF header injection.
  - Switched MIME parts from invalid UTF-8 7bit bodies to base64-encoded UTF-8 parts.
  - Made forward send as a new message instead of attaching it to the original thread, and included
    forwarded message content.
  - Changed archive/delete UI behavior to remove the thread only after Gmail confirms success.

---------

Co-authored-by: Ramnique Singh <30795890+ramnique@users.noreply.github.com>

apps/x/packages/shared/src/blocks.ts

@@ -123,6 +123,7 @@ export const GmailThreadMessageSchema = z.object({
   unread: z.boolean().optional(),
   bodyHeight: z.number().int().positive().optional(),
   attachments: z.array(GmailAttachmentSchema).optional(),
+  messageIdHeader: z.string().optional(),
 });
 
 export type GmailThreadMessage = z.infer<typeof GmailThreadMessageSchema>;