fix(files): Add declaration for `$navigation`

Signed-off-by: Ferdinand Thiessen <opensource@fthiessen.de>

apps/files/src/vue.d.ts

@@ -0,0 +1,7 @@
+import type { Navigation } from '@nextcloud/files'
+
+declare module 'vue/types/vue' {
+	interface Vue {
+		$navigation: Navigation
+	}
+}