[Enhancement] - Add ability to generate QR code from WebId

[andycwilliams]

Describe the Current Behavior/Feature:

Currently, if someone wants to provide their WebId to another, they have to tell them verbally or copy it to their clipboard and send it via another method.

We can add the ability to create a QR code for the user's WebId, which can then be scanned and shared with another person.

Rationale:

Having a QR would be faster and simpler to provide WebId, than having to memorize the ID itself (especially when that ID may be long and cumbersome).

This ability is widespread by now and may even be expected by some users. It would be good to at least have this as an option.

Proposed Changes:

Add a function on the user's Profile that will create the code.

Can check out free QR creation libraries, at least to start. One has not yet been decided upon.