Add unsend campaign feature (#45)

* Add unsend email editor

Add email editor

Add more email editor

Add renderer partial

Add more marketing email features

* Add more campaign feature

* Add variables

* Getting there

* campaign is there mfs

* Add migration

packages/email-editor/src/menus/TextMenuButton.tsx

@@ -0,0 +1,30 @@
+import { Button } from "@unsend/ui/src/button";
+import { cn } from "@unsend/ui/lib/utils";
+
+import { TextMenuItem } from "./TextMenu";
+
+export function TextMenuButton(item: TextMenuItem) {
+  return (
+    <Button
+      variant="ghost"
+      size="sm"
+      onClick={item.command}
+      className={cn(
+        "px-2.5 hover:bg-slate-100 hover:text-black",
+        item.isActive() ? "bg-slate-300" : ""
+      )}
+      type="button"
+    >
+      {item.icon ? (
+        <item.icon
+          className={cn(
+            "h-3.5 w-3.5",
+            item.isActive() ? "text-black" : "text-slate-700"
+          )}
+        />
+      ) : (
+        <span className="text-sm font-medium text-slate-700">{item.name}</span>
+      )}
+    </Button>
+  );
+}