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/Controllers/Forms/Integration/FormZapierWebhookController.php

@@ -13,7 +13,6 @@ class FormZapierWebhookController extends Controller
      */
     public function __construct()
     {
-        //        $this->middleware('subscribed');
         $this->middleware('auth');
     }