🚸 (dashboard) Add unpublish menu item in dashboard

Also remove the useless publishedTypebotId field in Typebot

Closes #232

packages/db/prisma/migrations/20230127153202_remove_useless_published_typebot_id/migration.sql

@@ -0,0 +1,8 @@
+/*
+  Warnings:
+
+  - You are about to drop the column `publishedTypebotId` on the `Typebot` table. All the data in the column will be lost.
+
+*/
+-- AlterTable
+ALTER TABLE "Typebot" DROP COLUMN "publishedTypebotId";