[generator][core] Add Mastodon and Bluesky

Signed-off-by: Harry Bond <me@hbond.xyz>

indexer/feature_meta.hpp

@@ -155,6 +155,8 @@ public:
     FMD_SELF_SERVICE = 47,
     FMD_OUTDOOR_SEATING = 48,
     FMD_NETWORK = 49,
+    FMD_CONTACT_FEDIVERSE = 50,
+    FMD_CONTACT_BLUESKY = 51,
     FMD_COUNT
   };