Add Follow buttons to Patron Profile pages

[Mek]

Currently, the patron profile page at https://openlibrary.org/people/ScarTissue has to follow button

But the My Books page at https://openlibrary.org/people/ScarTissue/books does

In templates/account/view.html, you can see that the Follow button widget is rendered at

openlibrary/openlibrary/templates/account/view.html

Lines 39 to 40 in 5d78986

 $if not mb.is_my_page and mb.is_subscribed != -1: 
   $:macros.Follow(mb.username, following=mb.is_subscribed) 

when the patron's account is public.

The issue requires you to add a Follow macro to the patron's profile page at https://github.com/internetarchive/openlibrary/blob/master/openlibrary/templates/type/user/view.html

You will not have th emb (my books) object available to you and so you will have to calculate

1. Whether the patron's account is public or private -- if it's private, don't render the widget!
2. Whether this profile page is the current visitor's profile page -- if so, don't render the widget!
3. Whether the visitor is subscribed or not to this patron

Most of this information is already accessible from the profile page:
https://github.com/internetarchive/openlibrary/blob/master/openlibrary/templates/type/user/view.html#L5-L6

This code block shows how you might determine if this page is the patron's page and whether the visitor is subscribed to this patron:
https://github.com/internetarchive/openlibrary/blob/master/openlibrary/plugins/upstream/mybooks.py#L442-L447

[pidgezero_one]

Hello! Mind if I take this one on?