Add py3Dmol to dev env file

[chrisjonesBSU]

PR Summary:

I think the dev environment should include py3Dmol. We could have a separate discussion if it should be included in the conda-forge package dependencies as well.

PR Checklist

---

• Includes appropriate unit test(s)
• Appropriate docstring(s) are added/updated
• Code is (approximately) PEP8 compliant
• Issue(s) raised/addressed?

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 86.21%. Comparing base (73963db) to head (484440a).
Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1248      +/-   ##
==========================================
+ Coverage   85.89%   86.21%   +0.32%     
==========================================
  Files          53       53              
  Lines        4862     4862              
==========================================
+ Hits         4176     4192      +16     
+ Misses        686      670      -16     

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