Initial logic for scroll view to required attachment

[Pratheek555]

Brief Title

Implement initial scroll-to-message logic for navigating to attachments from the All Files view

Acceptance Criteria fulfillment

• [ ] Clicking a file in the All Files view navigates to the original message
• [ ] The chat scrolls smoothly to the target message

Fixes #1057

Video/Screenshots

https://github.com/user-attachments/assets/69bf0a65-1ad7-4378-afad-fda76b3d340a

PR Test Details

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