feat(guild): gossip STICKER_UPSERT on guild mesh

Handle RPC 49 inbound gossip, emit guild-sticker events, and expose
gossipStickerUpsert for moderators uploading animated stickers.

index.js

@@ -374,6 +374,9 @@ class PearcordGuild extends EventEmitter {
     if (method === RPC.GUILD_BOOST_UPDATE) {
       this.emit('guild-boost', payload)
     }
+    if (method === RPC.STICKER_UPSERT) {
+      this.emit('guild-sticker', payload)
+    }
   }
 
   /** Deterministic gossip injection for Bare smokes (no live mesh). */
@@ -394,6 +397,10 @@ class PearcordGuild extends EventEmitter {
       this.emit('guild-emoji', payload)
       return
     }
+    if (method === RPC.STICKER_UPSERT) {
+      this.emit('guild-sticker', payload)
+      return
+    }
     this._onGossip(method, payload, { remotePublicKey: b4a.alloc(32) })
   }
 
@@ -529,6 +536,10 @@ class PearcordGuild extends EventEmitter {
     broadcastGossip(this, RPC.GUILD_BOOST_UPDATE, payload)
   }
 
+  gossipStickerUpsert (row) {
+    broadcastGossip(this, RPC.STICKER_UPSERT, row)
+  }
+
   sendScreenMedia (msg) {
     broadcastScreenMedia(this, msg)
   }