Feat/message add source view

[NO-MAP]

PR Description

What it does

This PR adds support for displaying the source view of messages by introducing a source field to the message system. This allows messages to be tagged with their origin (e.g., plugin name), making it easier for users to identify which extension or component sent a particular message.

Key changes:

• Added source property to MessageOptions interface in message-service-protocol.ts
• Updated MessageService to pass the source from options to the message payload
• Enhanced Notification object to include source information in the UI
• Modified MessageRegistryExt to automatically attach plugin identification as the source when plugins show messages
• Updated WorkspaceExtImpl to pass plugin context when displaying workspace-related error messages

How to test

1. Open a plugin that shows messages (notifications, alerts, etc.)
2. Verify that messages now display the source information (plugin publisher and name)
3. Messages from different sources should be distinguishable in the notification center
4. Test with both core messages and plugin-generated messages to ensure source is properly tracked

Follow-ups

• Consider adding UI improvements to highlight the source in notifications
• Add tests to verify source tracking in message delivery
• Document the new source field in the message API

link issue:
#17382