chore: import upstream snapshot with attribution

apps/webapp/app/components/primitives/LocaleProvider.tsx

@@ -0,0 +1,28 @@
+import type { ReactNode } from "react";
+import { createContext, useContext } from "react";
+
+type LocaleContext = {
+  locales: string[];
+};
+
+type LocaleContextProviderProps = {
+  locales: string[];
+  children: ReactNode;
+};
+
+const Context = createContext<LocaleContext | null>(null);
+
+export const LocaleContextProvider = ({ locales, children }: LocaleContextProviderProps) => {
+  const value = { locales };
+
+  return <Context.Provider value={value}>{children}</Context.Provider>;
+};
+
+const throwIfNoProvider = () => {
+  throw new Error("Please wrap your application in a LocaleContextProvider.");
+};
+
+export const useLocales = () => {
+  const { locales } = useContext(Context) ?? throwIfNoProvider();
+  return locales;
+};