[New Primitive] NumberInput

[zhouzi]

This request was originally posted in #2213

The idea is to add a number input component that allows a user to enter a number, and increment or decrement the value using stepper buttons.

The native type="number" has many shortcomings highlighted in this article:

• Why the GOV.UK Design System team changed the input type for numbers

Examples from other libraries:

• React Aria: NumberField
• Mantine: NumberInput (based on react-number-format)
• Chakra UI: Number Input (based on @ark-ui/react/number-input)
• Base UI: Number Field
• MUI: NumberInput
• Ark UI: Number Input