/claim #8072

Summary

Extends the Gmail piece with additional actions and triggers as outlined in #8072:

New Actions

• Add Label to Email — attach a label to an individual email via messages.modify
• Remove Label from Email — remove a specific label from an email
• Create Label — create a new user label with configurable visibility options
• Archive Email — archive by removing the INBOX label
• Delete Email — move to trash via messages.trash
• Remove Label from Thread — strip a label from all emails in a thread via threads.modify

New Trigger

• New Starred Email — fires when an email is starred (polls for starred emails within the last 2 days)

Other Changes

• Wires the existing New Conversation trigger into the piece registration (was defined but not registered)
• Adds gmail.modify and gmail.labels OAuth scopes required for label management, archive, and delete operations

Implementation Notes

• All new actions follow the existing pattern: createAction + googleapis + OAuth2Client
• Label-related actions reuse the existing GmailProps.label dropdown for consistent label selection
• Message/thread selection reuses existing GmailProps.message and GmailProps.thread dropdowns
• The starred trigger follows the same polling pattern as new-email.ts