feat: add v-shortcut directive for keyboard shortcuts (#942)

Co-authored-by: kolaente <k@knt.li>
Reviewed-on: https://kolaente.dev/vikunja/frontend/pulls/942
Reviewed-by: dpschen <dpschen@noreply.kolaente.de>
Co-authored-by: konrad <k@knt.li>
Co-committed-by: konrad <k@knt.li>

src/helpers/isAppleDevice.ts

@@ -0,0 +1,10 @@
+export const isAppleDevice = (): Boolean => {
+	return navigator.userAgent.includes('Mac') || [
+		'iPad Simulator',
+		'iPhone Simulator',
+		'iPod Simulator',
+		'iPad',
+		'iPhone',
+		'iPod',
+	].includes(navigator.platform)
+}