* add ts-jest

[im-calvin]

• attempt at testing translatedText. modules confuse me

[im-calvin]

Intellisense is telling me to change this to .../Translate.js but when I run jest it only works when the path is .../Translate. Not sure why (config issue?)
Here's the error by intellisense:

Relative import paths need explicit file extensions in ECMAScript imports when '--moduleResolution' is 'node16' or 'nodenext'. Did you mean '../src/translate/Translate.js'?ts(2835)

Even when I change it to .../Translate, I get another import error inside Translate.ts:

    Cannot find module '../utils/env.js' from 'src/translate/Translate.ts'

    Require stack:
      src/translate/Translate.ts
      tests/setup.test.ts

      1 | import { v3 } from "@google-cloud/translate";
    > 2 | import { readEnv } from "../utils/env.js";