Add invalid state to UIInputText

[eruvanos]

Add a invalid state on UIInputText to indicate a invalid input.

For now the state should be set from the outside.

Something like this:

Notes

• requires UIInputText to get basic style support.
• tracks features of an old issues: Enhancement: Add Disabled and Error states for UI elements #1255 and Support style for more widgets in arcade.gui (like UIInputText etc.) #1966

[eruvanos]

covered by #2633