feat: add unstar, unpin, copy link, and navigate options in starred and pinned messages list

[SinghaAnirban005]

Brief Title

Add Unstar, Unpin, Copy Link, and Navigate Options in Starred and Pinned messages

Acceptance Criteria fulfillment

• [x] Option to unstar messages from the starred messages list.
• [x] Option to unpin messages from the pinned messages list.
• [x] Provide the ability to copy the link to the message associated with starred or pinned messages.
• [x] Navigate to the original message in the chat for a selected message.

Fixes #741

Video/Screenshots

For starred messages list

https://github.com/user-attachments/assets/217eb033-25db-451a-b955-ad32192077d7

###For pinned messages list

https://github.com/user-attachments/assets/db626920-e7bf-4224-b9f0-5dd86113c1b0

PR Test Details

Note: The PR will be ready for live testing at https://rocketchat.github.io/EmbeddedChat/pulls/pr-744 after approval. Contributors are requested to replace <pr_number> with the actual PR number.

[Spiral-Memory]

@SinghaAnirban005 Rest looks fine, but instead of Navigate, let's be consistent and use Jump to Message Icon like in other sidebar

[SinghaAnirban005]

@Spiral-Memory okay

[SinghaAnirban005]

After changes

https://github.com/user-attachments/assets/09225cfb-4ce4-4f80-933e-7b6c0ded4938