Edit site names, with frontend and backend tests

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Codecov Report

Attention: Patch coverage is 96.15385% with 2 lines in your changes missing coverage. Please review.

Project coverage is 95.88%. Comparing base (6b0d4ee) to head (9ca57f2).

Files with missing lines	Patch %	Lines
rainfall/blueprint/site.py	85.71%	2 Missing :warning:

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Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #43 +/- ## ========================================== - Coverage 95.88% 95.88% -0.01% ========================================== Files 30 30 Lines 1897 1945 +48 ========================================== + Hits 1819 1865 +46 - Misses 78 80 +2 ```

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