feat(radio, radio-group): Enhance accessibility with arrow key navigation and aria attributes

[mryunt02]

This PR addresses and resolves issue #950.

Changes Made:

• Implemented arrow key navigation for the Radio Group component.
  • Down/Right Arrow:
    • Moves focus to and checks the next radio button in the group.
    • If focus is on the last radio button, moves focus to the first radio button.
    • The state of the previously checked radio button is changed to unchecked.
  • Up/Left Arrow:
    • Moves focus to and checks the previous radio button in the group.
    • If focus is on the first radio button, moves focus to and checks the last radio button.
    • The state of the previously checked radio button is changed to unchecked.
• Removed the aria-readonly property from the Radio Button component.
• Added the aria-checked attribute to the Radio Button component to indicate its checked state.

These changes improve the accessibility and user experience of the Radio Group component in compliance with W3C ARIA Radio Group Example.

This PR resolves issue #950.

[mryunt02]

this PR fails the test but I think it is necessary, I did not change the test file to avoid breaking it.

[erbilnas]

I don’t quite understand why you did this

[mryunt02]

aria-readonly property is not supported in Radio Group according to W3C ARIA Radio Group Example

[Enes5519]

It would be better to capitalize the first letter of the labels.