Add OpenAPI docs, frontend, migrations, and API updates

- OpenAPI: add missing endpoints (add-from-url, subscriptions, public availability)
- OpenAPI: CalendarSubscription schema, Subscriptions tag
- Frontend app
- Migrations: count_for_availability, subscriptions_sync, user_preferences, calendar_settings
- Config, rate limit, auth, calendar, booking, ICS, availability, user service updates

Made-with: Cursor

frontend/node_modules/date-fns/getWeekOfMonth.d.ts

@@ -0,0 +1,35 @@
+import type {
+  ContextOptions,
+  DateArg,
+  LocalizedOptions,
+  WeekOptions,
+} from "./types.js";
+/**
+ * The {@link getWeekOfMonth} function options.
+ */
+export interface GetWeekOfMonthOptions
+  extends LocalizedOptions<"options">,
+    WeekOptions,
+    ContextOptions<Date> {}
+/**
+ * @name getWeekOfMonth
+ * @category Week Helpers
+ * @summary Get the week of the month of the given date.
+ *
+ * @description
+ * Get the week of the month of the given date.
+ *
+ * @param date - The given date
+ * @param options - An object with options.
+ *
+ * @returns The week of month
+ *
+ * @example
+ * // Which week of the month is 9 November 2017?
+ * const result = getWeekOfMonth(new Date(2017, 10, 9))
+ * //=> 2
+ */
+export declare function getWeekOfMonth(
+  date: DateArg<Date> & {},
+  options?: GetWeekOfMonthOptions,
+): number;