Add remote control without wifi / "Shabad OS Connect"

[bhajneet]

Add some kind of method to connect and control Shabad OS without the wifi. So basically what we already allow with browsers on the network, but without the network part...

Allows multiple streamers to pull captioning from one central shabad os without requiring all streamers to share gurdwara internet bandwidth

Allows users to remote control shabad os when the gurdwara wifi is locked down (passwords not shared)

Allows elderly people to connect for reader purposes again in the same scenario above where the wifi is not shared in gurdwaras or is set up by non gurdwara committee members.

Allows people to follow along on live streams started on phones (so facebook / youtube for smartphones) where captioning isn't available.

Will be needed for mobile app anyways. Part of the idea of "Connnect to Shabad OS Nearby" or via some ID. Can use 4 non-ambiguous upper case letters (24) to get about 24^4 = 330k unique ids. I doubt that we will have that many concurrent users, but can always go for 3 pairs of numbers which is a million unique IDs.

Marking it high since it will be used in the future for a second project. Marking it "in research" to try and spec it out before any work is done. So if you have any UI questions or user flows, let's figure it out here first.