category-games: add itchio (#2446)

itch.io is an open marketplace for independent digital creators with a
focus on independent video games.

Co-authored-by: nobody <>

data/category-games

@@ -11,6 +11,7 @@ include:escapefromtarkov
 include:garena
 include:gog
 include:illusion
+include:itchio
 include:kurogames
 include:lowiro
 include:mihoyo

data/itchio

@@ -0,0 +1,2 @@
+itch.io
+itch.zone