[Feature][Server] Custom timezone - Add timezone into user info

[caishunfeng]

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• I had searched in the issues and found no similar feature requirement.

Description

Add timezone into user info, default server timezone, and user can select other timezone freely on UI.

Use case

No response

Related issues

No response

Are you willing to submit a PR?

• Yes I am willing to submit a PR!

Code of Conduct

• I agree to follow this project's Code of Conduct

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