feat: add announcement channels, publishing and following (#3090)

packages/constants/src/GuildConstants.ts

@@ -136,6 +136,7 @@ export const GuildFeatures = {
 	VISIONARY: 'VISIONARY',
 	LARGE_GUILD_OVERRIDE: 'LARGE_GUILD_OVERRIDE',
 	VERY_LARGE_GUILD: 'VERY_LARGE_GUILD',
+	ANNOUNCEMENT_CHANNELS_DISABLED: 'ANNOUNCEMENT_CHANNELS_DISABLED',
 } as const;
 
 export type GuildFeature = ValueOf<typeof GuildFeatures>;