Add Commas project to Plugins solution file

Included the Commas.csproj file under the Ivandrofly folder in Plugins.slnx. This ensures the Commas project is tracked and built as part of the solution.

Author: ivandrofly

source/Plugins.slnx

@@ -14,6 +14,7 @@
     <File Path="..\.github\workflows\main.yml" />
   </Folder>
   <Folder Name="/Ivandrofly/">
+    <Project Path="Commas\Commas.csproj" Type="Classic C#" />
     <Project Path="DialogueAutoMarker\DialogueAutoMarker.csproj" Type="Classic C#" />
     <Project Path="DictionariesProvider\DictionariesProvider.csproj" Type="Classic C#" />
     <Project Path="ExposeSEApi\ExposeSEApi.csproj" Type="Classic C#" />