[ao3] add initial support (#6013)

docs/configuration.rst

@@ -1279,6 +1279,20 @@ Extractor-specific Options
 ==========================
 
 
+extractor.ao3.formats
+---------------------
+Type
+    * ``string``
+    * ``list`` of ``strings``
+Default
+    ``"pdf"``
+Example
+    * ``"azw3,epub,mobi,pdf,html"``
+    * ``["azw3", "epub", "mobi", "pdf", "html"]``
+Description
+    Format(s) to download.
+
+
 extractor.artstation.external
 -----------------------------
 Type

docs/supportedsites.md

@@ -103,6 +103,12 @@ Consider all listed sites to potentially be NSFW.
     <td>Firms, Projects</td>
     <td></td>
 </tr>
+<tr>
+    <td>Archive of Our Own</td>
+    <td>https://archiveofourown.org/</td>
+    <td>Search Results, Series, Tag Searches, User Profiles, Bookmarks, Works</td>
+    <td></td>
+</tr>
 <tr>
     <td>ArtStation</td>
     <td>https://www.artstation.com/</td>