Support date-only, add TemporalExtentEmpty exception

[m-mohr]

• Support date-only
• check whether the temporal extent is empty

Found by the new test suite and want to make you aware. I won't have time to add tests, this is more a bug report rather than a full PR.

[codecov]

Codecov Report

Attention: 3 lines in your changes are missing coverage. Please review.

Comparison is base (8d9e3fb) 79.42% compared to head (737feb3) 79.33%.

Files	Patch %	Lines
...sses_dask/process_implementations/cubes/_filter.py	72.72%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #211      +/-   ##
==========================================
- Coverage   79.42%   79.33%   -0.10%     
==========================================
  Files          30       30              
  Lines        1468     1476       +8     
==========================================
+ Hits         1166     1171       +5     
- Misses        302      305       +3     

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