Finish changing user-facing login templates to use Social Login

[jwag956]

Did a sweep through docs and made some wording improvements.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 98.54%. Comparing base (7198e2c) to head (b2c38ff).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1185   +/-   ##
=======================================
  Coverage   98.54%   98.54%           
=======================================
  Files          40       40           
  Lines        5077     5077           
=======================================
  Hits         5003     5003           
  Misses         74       74           

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