Arabic date input support

[JoeMrCoffee]

Nextcloud (please complete the following information):

• Nextcloud-Version: [e.g. 19.0.0] - 30 + 31
• Forms-Version: [e.g. 2.0.0-beta4]

Is your feature request related to a problem? Please describe.
When sending a form that requests a Date the days of the week start differently than in Saudi Arabia which has a work week of Sunday to Thursday with Friday and Saturday as weekend. Because of this, the date has difficulty being selected - below are a couple of screenshots.

Describe the solution you'd like
A little unclear how this can be solved - perhaps something in the date picker can specify Arabic if the users are using the Nextcloud Arabic interface.

Additional context

[susnux]

If I understand it correctly the problem is if you type Hindu-Arabic numbers ( https://en.wikipedia.org/wiki/Hindu%E2%80%93Arabic_numeral_system ) then the picker rejects them.

In that case there needs to be some translation from that gylphs to ASCII numbers.
So sounds like a component issue rather than a forms issue