Add tests for subclassing Point or OrientedPoint instead of Object

[lola831]

Description

Adds two tests that assert TypeError when ego is a subclass of Point or OrientedPoint (must subclass Object).

Issue Link

N/A

Checklist

• I have tested the changes locally via pytest and/or other means
• I have added or updated relevant documentation
• I have autoformatted the code with black and isort
• I have added test cases (if applicable)

Additional Notes

N/A

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 89.67%. Comparing base (40d8d1d) to head (c3ecf5f).
⚠️ Report is 36 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #405      +/-   ##
==========================================
- Coverage   89.85%   89.67%   -0.18%     
==========================================
  Files          54       48       -6     
  Lines       13549    13194     -355     
==========================================
- Hits        12174    11832     -342     
+ Misses       1375     1362      -13     

see 54 files with indirect coverage changes

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[dfremont]

Two trivial formatting suggestions.

[dfremont]

I forgot I could just apply the suggestions myself, so I did that. Thanks Lola!