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/@babel/generator/lib/nodes.js

@@ -0,0 +1,19 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.generatorInfosMap = void 0;
+var generatorFunctions = require("./generators/index.js");
+var deprecatedGeneratorFunctions = require("./generators/deprecated.js");
+const generatorInfosMap = exports.generatorInfosMap = new Map();
+let index = 0;
+for (const key of Object.keys(generatorFunctions).sort()) {
+  if (key.startsWith("_")) continue;
+  generatorInfosMap.set(key, [generatorFunctions[key], index++, undefined]);
+}
+for (const key of Object.keys(deprecatedGeneratorFunctions)) {
+  generatorInfosMap.set(key, [deprecatedGeneratorFunctions[key], index++, undefined]);
+}
+
+//# sourceMappingURL=nodes.js.map