Rename spatial file and class

[tomvothecoder]

Description

• Closes [FEATURE]: Rename spatial_avg.py to spatial.py #206
• Rename spatial_avg.py to spatial.py
• Rename SpatialAverageAccessor to SpatialAccessor

Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• My changes generate no new warnings
• Any dependent changes have been merged and published in downstream modules

If applicable:

• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass with my changes (locally and CI/CD build)
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have noted that this is a breaking change for a major release (fix or feature that would cause existing functionality to not work as expected) -- won't release a new major version since the package is still in beta stage

[codecov-commenter]

Codecov Report

Merging #207 (5730e24) into main (201a575) will not change coverage.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##              main      #207    +/-   ##
==========================================
  Coverage   100.00%   100.00%            
==========================================
  Files            8         9     +1     
  Lines          381       742   +361     
==========================================
+ Hits           381       742   +361     

Impacted Files	Coverage Δ
xcdat/__init__.py	100.00% <100.00%> (ø)
xcdat/axis.py	100.00% <100.00%> (ø)
xcdat/bounds.py	100.00% <100.00%> (ø)
xcdat/dataset.py	100.00% <100.00%> (ø)
xcdat/spatial.py	100.00% <100.00%> (ø)
xcdat/temporal.py	100.00% <100.00%> (ø)
xcdat/utils.py	100.00% <100.00%> (ø)
xcdat/xcdat.py	100.00% <100.00%> (ø)

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[tomvothecoder]

Hi @pochedls, the diff in this PR is pretty small, but I wanted to see if you had any comments first before I merge it.

[pochedls]

I didn't actually pull this code and test it, but I did look through it and I approve. I didn't Immediately understand some of the superficial changes, e.g., from comment "Access spatial averaging method" to "Call spatial averaging method" but I assume there is a consistency reason for the change.

Overall, I like spatial better than spatial_avg

[tomvothecoder]

I didn't Immediately understand some of the superficial changes, e.g., from comment "Access spatial averaging method" to "Call spatial averaging method" but I assume there is a consistency reason for the change.

Yeah, those are just minor changes to align with programmatic terms. I'll comment next time on those types of changes since they aren't obvious.

Overall, I like spatial better than spatial_avg

Sounds good! I will merge this PR, thanks.