feat: create permission enum

This enum makes it possible which permissions a user needs to hold to access a specific resource

Signed-off-by: Philip Molares <philip.molares@udo.edu>

src/permissions/permissions.enum.ts

@@ -0,0 +1,21 @@
+/*
+ * SPDX-FileCopyrightText: 2021 The HedgeDoc developers (see AUTHORS file)
+ *
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+/*
+ * SPDX-FileCopyrightText: 2021 The HedgeDoc developers (see AUTHORS file)
+ *
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+/**
+ * Represents the Permissions a user may hold in a request
+ */
+export enum Permission {
+  READ = 'read',
+  WRITE = 'write',
+  CREATE = 'create',
+  OWNER = 'owner',
+}