[Feature] Add Currency format to TextBoxExtensions

[omikhailov]

Describe the problem this feature would solve

TextBoxExtensions has support for Decimal validation type, but this kind of validation does not allow currency signs, e.g. $ or €.

Describe the solution

Add Currency to ValidationType enum and update TextBoxExtensions to accept values in {0:C} string format, not just {0:N} like in Decimal mode.

[ghost]

Hello, 'omikhailov! Thanks for submitting a new feature request. I've automatically added a vote 👍 reaction to help get things started. Other community members can vote to help us prioritize this feature in the future!

[michael-hawker]

Moving feature to next milestone out of hotfix release.

[NaftoliOst]

Hi,
Can I claim this issue?

[michael-hawker]

Using issue for discussion as PRs are in flux.

@NaftoliOst was talking with @Arlodotexe about culture variants. We were thinking maybe we should extend the IsNumeric and IsDecimal functions in the .NET Community Toolkit to accept culture arguments too? (FYI @Sergio0694)

Then we could have a new Culture attached property for the regex extensions we could use to configure the culture setting for Numeric, Decimal, and Currency.

Thoughts?