Feature request: Add an "About" block with app version and project links to the Help section (or nearby)

[lvarnava]

Currently, it is not immediately obvious to end users which version of Tachyon Webmail is running from within the web interface.
Administrators currently have to log into the admin panel or console to check it.

Proposed Solution:
Add an About section under Help (or Menu or Settings) that displays:
• Current Tachyon version (e.g., v4.5.0)
• Link to the project website (https://tachyonmail.app)
• Link to the source repository (https://github.com/kimusan/Tachyon)
• License notice (AGPL-3.0)

[lvarnava]

Thank you @kimusan.
Everything is great!