[Mobile friendly] PWA installation instruction for users

[Pjaijai]

PWA is technically on Production. In case you don't know what is PWA click here

We should let people know how to install the app. Should create a page to teach user how to get the app.

Must cover

• Chrome (For Android User)
• Safari (For IOS User)

[Pjaijai]

@cyruscsc If you have any concerns or anything want to discuss, feel free to speak out !

[Pjaijai]

Reference: https://linear.app/docs/get-the-app

[Pjaijai]

done