Add GitlabRoutes enum

types/Gitlab/GitlabRoutes.ts

+enum GitlabRoutes {
+    NOTIFICATION_SETTINGS  = '/notification_settings',
+    USERS_GET              = '/users',
+    REPOSITORY_GET         = '/projects/{{id}}',
+    REPOSITORY_CREATE      = '/projects',
+    REPOSITORY_FORK        = '/projects/{{id}}/fork',
+    REPOSITORY_MEMBER_ADD  = '/projects/{{id}}/members',
+    REPOSITORY_MEMBERS_GET = '/projects/{{id}}/members/all'
+}
+
+
+export default GitlabRoutes;
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