Zapier integration (#491)

* create zapier app

* install sanctum

* move OAuthProviderController

* make `api-external` middleware

* add zapier endpoints

* add tests

* token management

* zapier event handler

* add policy

* use `slug` instead of `id`

* wip

* check policies

* change api prefix to `external`

* ui tweaks

* validate token abilities

* open zapier URL

* zapier ui tweaks

* update zap

* Fix linting

* Added sample endpoints + minor UI changes

* Run PHP code linter

---------

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

app/Http/Resources/Zapier/FormResource.php

@@ -0,0 +1,19 @@
+<?php
+
+namespace App\Http\Resources\Zapier;
+
+use Illuminate\Http\Resources\Json\JsonResource;
+
+/**
+ * @property \App\Models\Forms\Form $resource
+ */
+class FormResource extends JsonResource
+{
+    public function toArray($request)
+    {
+        return [
+            'id' => $this->resource->slug,
+            'name' => $this->resource->title,
+        ];
+    }
+}