Billing / plus frontend (#2130)

* [wip] initial

* [wip] subscriptions/plus frontend

* [wip] finish payment flow

* Charges page

* finish most subscriptions work

* Finish

* update eslint

* Fix issues

* fix intl extract

* fix omorphia locale extract

* fix responsiveness

* fix lint

apps/frontend/src/composables/country.js

@@ -0,0 +1,6 @@
+export const useUserCountry = () =>
+  useState("userCountry", () => {
+    const headers = useRequestHeaders(["cf-ipcountry"]);
+
+    return headers["cf-ipcountry"] ?? "US";
+  });