fix(site): Upload template files on template version editor (#6222)

site/jest.setup.ts

@@ -3,6 +3,14 @@ import { cleanup } from "@testing-library/react"
 import crypto from "crypto"
 import { server } from "./src/testHelpers/server"
 import "jest-location-mock"
+import { TextEncoder, TextDecoder } from "util"
+import { Blob } from "buffer"
+
+global.TextEncoder = TextEncoder
+// eslint-disable-next-line @typescript-eslint/no-explicit-any -- Polyfill for jsdom
+global.TextDecoder = TextDecoder as any
+// eslint-disable-next-line @typescript-eslint/no-explicit-any -- Polyfill for jsdom
+global.Blob = Blob as any
 
 // Polyfill the getRandomValues that is used on utils/random.ts
 Object.defineProperty(global.self, "crypto", {