Allow users to create private form templates (#210)

* Allow users to create private form templates

* Improve back-end efficiency

---------

Co-authored-by: Julien Nahum <julien@nahum.net>

database/migrations/2023_09_21_092812_add_creator_id_to_templates.php

@@ -0,0 +1,32 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    /**
+     * Run the migrations.
+     *
+     * @return void
+     */
+    public function up()
+    {
+        Schema::table('templates', function (Blueprint $table) {
+            $table->foreignIdFor(\App\Models\User::class,'creator_id')->nullable();
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     *
+     * @return void
+     */
+    public function down()
+    {
+        Schema::table('templates', function (Blueprint $table) {
+            $table->dropColumn('creator_id');
+        });
+    }
+};