Describe the problem

When using arduion IDE 2.0 on Windows, when trying to add additional board URL through the settings, I can't apply it with OK button, it says Invalid sketchbook location: c:\Users\User\Documents\Arduino.
It happened because the folder does not exists. If I create the folder it solves it, but the application itself should create the folder automatically in case it's not exists.

It happens here:
arduino/arduino-ide/arduino-ide-extension/src/browser/dialogs/settings/settings.ts
I would add additional check before of that:
pseudo code:

IF {default sketch folder does not exists}
THEN create it
...

Let me know if it's something you would interested in I can make new PR.

To reproduce

Delete C:\Users\User\Documents\Arduino folder, then try to add additional board URL in settings.

Expected behavior

Add board URL without ERROR.

Arduino IDE version

2.0.0

Operating system

Windows

Operating system version

11

Additional context

.

Issue checklist

• I searched for previous reports in the issue tracker
• I verified the problem still occurs when using the latest nightly build
• My report contains all necessary details