Improve MineGeo interface and functionality

shared/site-settings.ts

@@ -0,0 +1,7 @@
+import { z } from "zod";
+
+export const siteSettingsSchema = z
+  .object({ betaBadgeEnabled: z.boolean() })
+  .strict();
+export type SiteSettings = z.infer<typeof siteSettingsSchema>;
+export const defaultSiteSettings: SiteSettings = { betaBadgeEnabled: true };