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/nl-BE/_lib/localize.js

@@ -0,0 +1,129 @@
+import { buildLocalizeFn } from "../../_lib/buildLocalizeFn.js";
+
+const eraValues = {
+  narrow: ["v.C.", "n.C."],
+  abbreviated: ["v.Chr.", "n.Chr."],
+  wide: ["voor Christus", "na Christus"],
+};
+
+const quarterValues = {
+  narrow: ["1", "2", "3", "4"],
+  abbreviated: ["K1", "K2", "K3", "K4"],
+  wide: ["1e kwartaal", "2e kwartaal", "3e kwartaal", "4e kwartaal"],
+};
+
+const monthValues = {
+  narrow: ["J", "F", "M", "A", "M", "J", "J", "A", "S", "O", "N", "D"],
+  abbreviated: [
+    "jan.",
+    "feb.",
+    "mrt.",
+    "apr.",
+    "mei",
+    "jun.",
+    "jul.",
+    "aug.",
+    "sep.",
+    "okt.",
+    "nov.",
+    "dec.",
+  ],
+
+  wide: [
+    "januari",
+    "februari",
+    "maart",
+    "april",
+    "mei",
+    "juni",
+    "juli",
+    "augustus",
+    "september",
+    "oktober",
+    "november",
+    "december",
+  ],
+};
+
+const dayValues = {
+  narrow: ["Z", "M", "D", "W", "D", "V", "Z"],
+  short: ["zo", "ma", "di", "wo", "do", "vr", "za"],
+  abbreviated: ["zon", "maa", "din", "woe", "don", "vri", "zat"],
+  wide: [
+    "zondag",
+    "maandag",
+    "dinsdag",
+    "woensdag",
+    "donderdag",
+    "vrijdag",
+    "zaterdag",
+  ],
+};
+
+const dayPeriodValues = {
+  narrow: {
+    am: "AM",
+    pm: "PM",
+    midnight: "middernacht",
+    noon: "het middag",
+    morning: "'s ochtends",
+    afternoon: "'s namiddags",
+    evening: "'s avonds",
+    night: "'s nachts",
+  },
+  abbreviated: {
+    am: "AM",
+    pm: "PM",
+    midnight: "middernacht",
+    noon: "het middag",
+    morning: "'s ochtends",
+    afternoon: "'s namiddags",
+    evening: "'s avonds",
+    night: "'s nachts",
+  },
+  wide: {
+    am: "AM",
+    pm: "PM",
+    midnight: "middernacht",
+    noon: "het middag",
+    morning: "'s ochtends",
+    afternoon: "'s namiddags",
+    evening: "'s avonds",
+    night: "'s nachts",
+  },
+};
+
+const ordinalNumber = (dirtyNumber, _options) => {
+  const number = Number(dirtyNumber);
+  return number + "e";
+};
+
+export const localize = {
+  ordinalNumber,
+
+  era: buildLocalizeFn({
+    values: eraValues,
+    defaultWidth: "wide",
+  }),
+
+  quarter: buildLocalizeFn({
+    values: quarterValues,
+    defaultWidth: "wide",
+    argumentCallback: (quarter) => quarter - 1,
+  }),
+
+  month: buildLocalizeFn({
+    values: monthValues,
+    defaultWidth: "wide",
+  }),
+
+  day: buildLocalizeFn({
+    values: dayValues,
+    defaultWidth: "wide",
+  }),
+
+  dayPeriod: buildLocalizeFn({
+    values: dayPeriodValues,
+    defaultWidth: "wide",
+  }),
+};