feat(services): add guilds endpoints

prisma/migrations/20220209215000_init_5/migration.sql

@@ -0,0 +1,5 @@
+-- DropForeignKey
+ALTER TABLE "Channel" DROP CONSTRAINT "Channel_guildId_fkey";
+
+-- AddForeignKey
+ALTER TABLE "Channel" ADD CONSTRAINT "Channel_guildId_fkey" FOREIGN KEY ("guildId") REFERENCES "Guild"("id") ON DELETE CASCADE ON UPDATE CASCADE;