Add Row type aliases

[taldcroft]

Description

This is a trivial PR to add type aliases for a couple of Row types. This is just to provide a type annotation that helps distinguish between a row in a StarsTable and and a row in an ACACatalogTable.

Interface impacts

None.

Testing

Unit tests

• [x] Mac

  
  (ska3) ➜  proseco git:(row-type-aliases) git rev-parse HEAD                 
  d90681ec916fe0ab3e43d975130694402320c66d
  (ska3) ➜  proseco git:(row-type-aliases) pytest
  ======================================================== test session starts ========================================================
  platform darwin -- Python 3.10.8, pytest-7.2.1, pluggy-1.0.0
  rootdir: /Users/aldcroft/git, configfile: pytest.ini
  plugins: timeout-2.1.0, anyio-3.6.2
  collected 165 items                                                                                                                 

proseco/tests/test_acq.py .................................... [ 21%] proseco/tests/test_catalog.py .......................................... [ 47%] proseco/tests/test_core.py ........................... [ 63%] proseco/tests/test_diff.py ...... [ 67%] proseco/tests/test_fid.py ............... [ 76%] proseco/tests/test_guide.py ................................... [ 97%] proseco/tests/test_mon_full_cat.py .... [100%]

======================================================= 165 passed in 33.84s ========================================================

Independent check of unit tests by Jean
- [x] Mac

### Functional tests
<!-- Describe and document results of any functional tests, otherwise leave the text below -->
No functional testing.