Add exception for coords of len <= 1 or multidimensional coords in fill_missing_bounds()

[tomvothecoder]

Description

• Closes Cannot generate bounds for a dataset that has no bounds #137
• Rename fill_missing() to fill_missing_bounds() -- breaking change
• Update logger name to root in bounds.py

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) -- skipping major release, will note in changelog for v0.2.0

[tomvothecoder]

This was named as fill_missing() since it is encapsulated under bounds accessor (ds.bounds.fill_missing()/DatasetBounds(ds).fill_missing()), which explains the target is filling the missing bounds.

However, it has been changed to fill_missing_bounds() so that it is in alignment with ds.xcdat.fill_missing_bounds()/XCDATAccessor(ds).fill_missing_bounds() to make APIs consistent.

[chengzhuzhang]

It's a nice change! Thank you.

[tomvothecoder]

Hi @chengzhuzhang, this PR is ready for review. Thanks!

[chengzhuzhang]

It's a nice change! Thank you.

[codecov-commenter]

Codecov Report

Merging #141 (23db00a) into main (af67830) will not change coverage.
The diff coverage is 100.00%.

@@            Coverage Diff            @@
##              main      #141   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files            7         7           
  Lines          342       345    +3     
=========================================
+ Hits           342       345    +3     

Impacted Files	Coverage Δ
xcdat/bounds.py	100.00% <100.00%> (ø)
xcdat/dataset.py	100.00% <100.00%> (ø)
xcdat/xcdat.py	100.00% <100.00%> (ø)

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