Add parameter type for semitone values

[sonarcloud[bot]]

Quality Gate passed

Issues
1 New issue
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 92.85714% with 1 line in your changes missing coverage. Please review.

Project coverage is 89.58%. Comparing base (554f6a4) to head (94f0d7b).

Files	Patch %	Lines
...dsp_parameters/ParamUtils/chowdsp_ParameterTypes.h	85.71%	1 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #546 +/- ## ======================================= Coverage 89.58% 89.58% ======================================= Files 317 317 Lines 10932 10946 +14 Branches 1095 1097 +2 ======================================= + Hits 9793 9806 +13 - Misses 1129 1130 +1 Partials 10 10 ```

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