[vichan] add generic extractors for vichan imageboards

includes 8kun.top, smuglo.li, and wikieat.club

docs/supportedsites.md

@@ -55,12 +55,6 @@ Consider all sites to be NSFW unless otherwise known.
     <td>Boards, Threads</td>
     <td></td>
 </tr>
-<tr>
-    <td>8kun</td>
-    <td>https://8kun.top/</td>
-    <td>Boards, Threads</td>
-    <td></td>
-</tr>
 <tr>
     <td>8muses</td>
     <td>https://comics.8muses.com/</td>
@@ -763,12 +757,6 @@ Consider all sites to be NSFW unless otherwise known.
     <td>Presentations</td>
     <td></td>
 </tr>
-<tr>
-    <td>Smugloli</td>
-    <td>https://smuglo.li/</td>
-    <td>Boards, Threads</td>
-    <td></td>
-</tr>
 <tr>
     <td>SmugMug</td>
     <td>https://www.smugmug.com/</td>
@@ -907,12 +895,6 @@ Consider all sites to be NSFW unless otherwise known.
     <td>Artists, Artist Listings, Artworks, individual Images</td>
     <td></td>
 </tr>
-<tr>
-    <td>Wikieat</td>
-    <td>https://wikieat.club/</td>
-    <td>Boards, Threads</td>
-    <td></td>
-</tr>
 <tr>
     <td>xHamster</td>
     <td>https://xhamster.com/</td>
@@ -1112,6 +1094,28 @@ Consider all sites to be NSFW unless otherwise known.
     <td></td>
 </tr>
 
+<tr>
+    <td colspan="4"><strong>vichan Imageboards</strong></td>
+</tr>
+<tr>
+    <td>8kun</td>
+    <td>https://8kun.top/</td>
+    <td>Boards, Threads</td>
+    <td></td>
+</tr>
+<tr>
+    <td>Wikieat</td>
+    <td>https://wikieat.club/</td>
+    <td>Boards, Threads</td>
+    <td></td>
+</tr>
+<tr>
+    <td>Smugloli</td>
+    <td>https://smuglo.li/</td>
+    <td>Boards, Threads</td>
+    <td></td>
+</tr>
+
 <tr>
     <td colspan="4"><strong>Moebooru and MyImouto</strong></td>
 </tr>