[koharu] cleanup

- update BASE_PATTERN formatting
- fix groups indices
- add tests for new domains
- update docs/supportedsites

docs/supportedsites.md

@@ -511,12 +511,6 @@ Consider all listed sites to potentially be NSFW.
     <td>Soundtracks</td>
     <td></td>
 </tr>
-<tr>
-    <td>Koharu</td>
-    <td>https://koharu.to/</td>
-    <td>Favorites, Galleries, Search Results</td>
-    <td></td>
-</tr>
 <tr>
     <td>Komikcast</td>
     <td>https://komikcast.cz/</td>
@@ -829,6 +823,12 @@ Consider all listed sites to potentially be NSFW.
     <td>Articles, Tag Searches</td>
     <td></td>
 </tr>
+<tr>
+    <td>SchaleNetwork</td>
+    <td>https://niyaniya.moe/</td>
+    <td>Favorites, Galleries, Search Results</td>
+    <td></td>
+</tr>
 <tr>
     <td>Scrolller</td>
     <td>https://scrolller.com/</td>