[Timetable] Make TimeTable shareable

[Anomaly42]

Is your feature request related to a problem? Please describe.
There is no way to share your timetable with others.

Describe the solution you'd like
Generate a URL to share timetable of current semester.
URL can have the format: https://resobin.gymkhana.iitb.ac.in/timetable/share?ids=123,233,878,453

Features

• Generate a URL to share timetable of current semester
• Allow user to share the URL via Whatsapp
• Allow user to share the URL via Mail
• Allow user to share the URL via QR Code