[docs] add steamgriddb to supportedsites.md

docs/supportedsites.md

@@ -811,6 +811,12 @@ Consider all listed sites to potentially be NSFW.
     <td>Presentations</td>
     <td></td>
 </tr>
+<tr>
+    <td>SteamGridDB</td>
+    <td>https://www.steamgriddb.com</td>
+    <td>Individual Assets, Grids, Heroes, Icons, Logos</td>
+    <td></td>
+</tr>
 <tr>
     <td>SubscribeStar</td>
     <td>https://www.subscribestar.com/</td>

scripts/supportedsites.py

@@ -121,6 +121,7 @@ CATEGORY_MAP = {
     "slideshare"     : "SlideShare",
     "smugmug"        : "SmugMug",
     "speakerdeck"    : "Speaker Deck",
+    "steamgriddb"    : "SteamGridDB",
     "subscribestar"  : "SubscribeStar",
     "tbib"           : "The Big ImageBoard",
     "tcbscans"       : "TCB Scans",
@@ -262,6 +263,9 @@ SUBCATEGORY_MAP = {
     "smugmug": {
         "path": "Images from Users and Folders",
     },
+    "steamgriddb": {
+        "asset": "Individual Assets",
+    },
     "tumblr": {
         "day": "Days",
     },