Add support for GitHub Project item status change notifications

[EhsanKey]

Add support for notifying Telegram when the status of a GitHub Project item changes.

Supported items

• Issue
• Pull request
• Draft issue

Expected behavior

When the Status field of a GitHub Project item is updated, the bot should send a Telegram notification containing:

• User who changed the status (if available)
• Project name
• Item type (Issue, Pull Request, or Draft Issue)
• Item title
• Previous status
• New status
• Link to the item (when available)

Notes

• Only changes to the Status field should trigger notifications.
• Ignore updates to other project fields such as Assignees, Labels, Iteration, Priority, or custom fields.