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/Providers/RouteServiceProvider.php

@@ -33,6 +33,10 @@ class RouteServiceProvider extends ServiceProvider
             Route::middleware('api')
                 ->namespace($this->namespace)
                 ->group(base_path('routes/api.php'));
+
+            Route::middleware('api-external')
+                ->namespace($this->namespace)
+                ->group(base_path('routes/api-external.php'));
         });
     }