Fix search in RTD docs

[mcara]

Closes #239

Trying to fix search box + other updates

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 93.51%. Comparing base (f58bb46) to head (6d0b750).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #248   +/-   ##
=======================================
  Coverage   93.51%   93.51%           
=======================================
  Files          11       11           
  Lines        2021     2021           
=======================================
  Hits         1890     1890           
  Misses        131      131           

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[braingram]

Thanks for making these updates. The search isn't working when I click the built docs. Let's see if using a newer python (required to pick up the newest sphinx) will fix it.

[braingram]

Search is still not working. Looks like there are more things to untangle as the docs theme is still in the docs config:
https://github.com/mcara/tweakwcs/blob/e141f23c4cc34c521325269ef50285bebd6e895f/docs/conf.py#L7

[mcara]

I have no idea what happened by I did remove the stsci_rtd_theme locally and tested it locally to work. I guess I forgot to commit the changes.

[braingram]

Hopefully the search works after merge.