feat: Display "You" in Sidebar After User's Own Name

[abhipatel0211]

Proposed changes (including videos or screenshots)

I've added a feature to display "You" in the sidebar after a user's own name. This provides a clear visual indication when users are viewing their own name in the sidebar.

Issue(s)

Closes RocketChat/feature-requests#880

Steps to test or reproduce

1. Open the Rocket.Chat client.
2. Navigate to the sidebar where all users are listed.
3. Observe the display of usernames and ensure "You" is shown after the user's own name.

Further comments

I've tested this locally, and it works as expected. If there are any additional changes or considerations, please let me know. I'm open to feedback and ready to make adjustments if needed.

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