[UI v2] feat: Adds npm script to check only typescript types

[devinvillarosa]

Adds npm script validate:types (same script name from /ui) to only validate typescript.

We currently don't have an npm script that does it. We do have npm run build which does type checking and builds the app.

Adding this command, because before pushing and opening a PR, I would like to validate types on my client. My IDE doesn't always catch all errors

Checklist

• This pull request references any related issue by including "closes <link to issue>"
  • If no issue exists and your change is not a small fix, please create an issue first.
• If this pull request adds new functionality, it includes unit tests that cover the changes
• If this pull request removes docs files, it includes redirect settings in mint.json.
• If this pull request adds functions or classes, it includes helpful docstrings.

Relates to #15512

[pleek91]

do we need to build the types or can we just check them? In other projects we use the "noEmit" flag. Not sure if it makes a difference though?

[devinvillarosa]

do we need to build the types or can we just check them? In other projects we use the "noEmit" flag. Not sure if it makes a difference though?

ahh let me check if that works