reorganize and cleanup php server code

server/app/Events/Role/Created.php

@@ -0,0 +1,5 @@
+<?php
+
+namespace Vanguard\Events\Role;
+
+class Created extends RoleEvent {}

server/app/Events/Role/Deleted.php

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+<?php
+
+namespace Vanguard\Events\Role;
+
+class Deleted extends RoleEvent {}

server/app/Events/Role/PermissionsUpdated.php

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+<?php
+
+namespace Vanguard\Events\Role;
+
+class PermissionsUpdated {}

server/app/Events/Role/RoleEvent.php

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+<?php
+
+namespace Vanguard\Events\Role;
+
+use Vanguard\Role;
+
+abstract class RoleEvent
+{
+    /**
+     * @var Role
+     */
+    protected $role;
+
+    public function __construct(Role $role)
+    {
+        $this->role = $role;
+    }
+
+    /**
+     * @return Role
+     */
+    public function getRole()
+    {
+        return $this->role;
+    }
+}

server/app/Events/Role/Updated.php

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+<?php
+
+namespace Vanguard\Events\Role;
+
+class Updated extends RoleEvent {}