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/locale/_lib/buildLocalizeFn.cjs

@@ -0,0 +1,65 @@
+"use strict";
+exports.buildLocalizeFn = buildLocalizeFn;
+
+/**
+ * The localize function argument callback which allows to convert raw value to
+ * the actual type.
+ *
+ * @param value - The value to convert
+ *
+ * @returns The converted value
+ */
+
+/**
+ * The map of localized values for each width.
+ */
+
+/**
+ * The index type of the locale unit value. It types conversion of units of
+ * values that don't start at 0 (i.e. quarters).
+ */
+
+/**
+ * Converts the unit value to the tuple of values.
+ */
+
+/**
+ * The tuple of localized era values. The first element represents BC,
+ * the second element represents AD.
+ */
+
+/**
+ * The tuple of localized quarter values. The first element represents Q1.
+ */
+
+/**
+ * The tuple of localized day values. The first element represents Sunday.
+ */
+
+/**
+ * The tuple of localized month values. The first element represents January.
+ */
+
+function buildLocalizeFn(args) {
+  return (value, options) => {
+    const context = options?.context ? String(options.context) : "standalone";
+
+    let valuesArray;
+    if (context === "formatting" && args.formattingValues) {
+      const defaultWidth = args.defaultFormattingWidth || args.defaultWidth;
+      const width = options?.width ? String(options.width) : defaultWidth;
+
+      valuesArray =
+        args.formattingValues[width] || args.formattingValues[defaultWidth];
+    } else {
+      const defaultWidth = args.defaultWidth;
+      const width = options?.width ? String(options.width) : args.defaultWidth;
+
+      valuesArray = args.values[width] || args.values[defaultWidth];
+    }
+    const index = args.argumentCallback ? args.argumentCallback(value) : value;
+
+    // @ts-expect-error - For some reason TypeScript just don't want to match it, no matter how hard we try. I challenge you to try to remove it!
+    return valuesArray[index];
+  };
+}