feat: distance modulus

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 75.00000% with 5 lines in your changes missing coverage. Please review.

Project coverage is 88.10%. Comparing base (2977ff0) to head (ace8383).

Files	Patch %	Lines
src/unxt/_quantity/distance.py	75.00%	5 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #131 +/- ## ========================================== + Coverage 88.09% 88.10% +0.01% ========================================== Files 22 22 Lines 1285 1303 +18 ========================================== + Hits 1132 1148 +16 - Misses 153 155 +2 ```

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