Adding support for initializing MirParser from Path objects

[kartographer]

Description

Added support for using Path objects to initialize MirParser objects in addiion to strings.

Motivation and Context

This was a previously (but not explicitly) supported feature with MirParser class that was integrated into some internal scripts prior to merging of #1371. Because adding support for this was trivial, I've added it back here.

Types of changes

• New feature (non-breaking change which adds functionality)

Checklist:

• I have read the contribution guide.
• My code follows the code style of this project.

New feature checklist:

• I have added or updated the docstrings associated with my feature using the numpy docstring format.
• I have updated the tutorial to highlight my new feature (if appropriate).
• I have added tests to cover my new feature.
• All new and existing tests pass.
• I have updated the CHANGELOG.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (1069b40) 99.92% compared to head (ce5e27e) 99.92%.
Report is 3 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1405   +/-   ##
=======================================
  Coverage   99.92%   99.92%           
=======================================
  Files          37       37           
  Lines       20766    20767    +1     
=======================================
+ Hits        20750    20751    +1     
  Misses         16       16           

Files	Coverage Δ
pyuvdata/uvdata/mir_meta_data.py	100.00% <100.00%> (ø)
pyuvdata/uvdata/mir_parser.py	100.00% <ø> (ø)

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