fix: Add cache for sanity language query

We had a issue where we would query sanity for supported languages for each field in our schemas. This would result in over 100 api requests on some pages, draining our total api requests

studio/studioConfig.tsx

@@ -1,10 +1,14 @@
 import { colorInput } from "@sanity/color-input";
 import { documentInternationalization } from "@sanity/document-internationalization";
 import { visionTool } from "@sanity/vision";
+import { SanityClient } from "next-sanity";
 import { WorkspaceOptions } from "sanity";
 import { presentationTool } from "sanity/presentation";
 import { structureTool } from "sanity/structure";
-import { internationalizedArray } from "sanity-plugin-internationalized-array";
+import {
+  Language,
+  internationalizedArray,
+} from "sanity-plugin-internationalized-array";
 import { media } from "sanity-plugin-media";
 
 import { languageID } from "i18n/languageSchemaField";
@@ -17,6 +21,21 @@ import { legalDocumentID } from "./schemas/documents/admin/legalDocuments";
 
 const SUPPORTED_LANGUAGES_QUERY = `*[_type == "languageSettings" && !(_id in path("drafts.*"))].languages[]{id, title}`;
 
+let cachedSupportedLanguages: Promise<Language[]> | null = null;
+//TODO: This might not be the perfect solution, but it works for now.
+function getSupportedLanguages(client: SanityClient) {
+  if (!cachedSupportedLanguages) {
+    cachedSupportedLanguages = client
+      .fetch(SUPPORTED_LANGUAGES_QUERY)
+      .catch((err: Error) => {
+        cachedSupportedLanguages = null; // Reset cache on error
+        throw err;
+      });
+  }
+
+  return cachedSupportedLanguages;
+}
+
 const config: WorkspaceOptions = {
   name: "studio",
   title: "Studio",
@@ -32,20 +51,13 @@ const config: WorkspaceOptions = {
     }),
     visionTool({ defaultApiVersion: apiVersion }),
     documentInternationalization({
-      supportedLanguages: (client) => {
-        return client.fetch(SUPPORTED_LANGUAGES_QUERY);
-      },
+      supportedLanguages: (client) => getSupportedLanguages(client),
       schemaTypes: [legalDocumentID],
       languageField: languageID,
       apiVersion,
-      // Optional. Adds UI for publishing all translations at once. Requires access to the Scheduling API
-      // https://www.sanity.io/docs/scheduling-api
-      // bulkPublish: true,
     }),
     internationalizedArray({
-      languages: (client) => {
-        return client.fetch(SUPPORTED_LANGUAGES_QUERY);
-      },
+      languages: (client) => getSupportedLanguages(client),
       fieldTypes: ["string", "richText", "seo", "text"],
     }),
     presentationTool({