(core) Porting the AI evaluation script

Summary:
Porting script that run an evaluation against our formula dataset.

To test you need an openai key (see here: https://platform.openai.com/)
or hugging face (it should work as well), then checkout the branch and run

`OPENAI_API_KEY=<my_openai_api_key> node core/test/formula-dataset/runCompletion.js`

Test Plan:
Needs manually testing: so far there is no plan to make it part of CI.

The current score is somewhere around 34 successful prompts over a total of 47.

Reviewers: paulfitz

Reviewed By: paulfitz

Subscribers: jarek

Differential Revision: https://phab.getgrist.com/D3816

app/common/gutil.ts

@@ -951,7 +951,7 @@ export function assertIsDefined<T>(name: string, value: T): asserts value is Non
  * Calls function `fn`, passes any thrown errors to function `recover`, and finally calls `fn`
  * once more if `recover` doesn't throw.
  */
- export async function retryOnce<T>(fn: () => Promise<T>, recover: (e: unknown) => Promise<void>): Promise<T> {
+export async function retryOnce<T>(fn: () => Promise<T>, recover: (e: unknown) => Promise<void>): Promise<T> {
   try {
     return await fn();
   } catch (e) {
@@ -964,7 +964,7 @@ export function assertIsDefined<T>(name: string, value: T): asserts value is Non
  * Checks if value is 'empty' (like null, undefined, empty string, empty array/set/map, empty object).
  * Values like 0, true, false are not empty.
  */
- export function notSet(value: any) {
+export function notSet(value: any) {
   return value === undefined || value === null || value === ''
          || (Array.isArray(value) && !value.length)
          || (typeof value === 'object' && !Object.keys(value).length)