feat(radio): add pf-radio

[Arathy-s]

What I did

Developed a custom pf-radio component utilizing the standard <input type="radio" /> element for enhanced functionality and styling.

Testing Instructions

1. Mouse Interaction

• Single Click: Clicking a radio button should select it.
• Subsequent Click: Clicking an already selected radio button should not deselect it.
• Group Selection: When clicking a different radio button within the same group, the previously selected radio button should be deselected, and the new radio button should be selected.

2. Keyboard Navigation

• Tab Key(on page navigation): Pressing the Tab key should focus on the first radio button in the group. If a radio button is already selected, that selected button should be focused instead of the first one.
• Shift + Tab(on page navigation): Pressing Shift + Tab should focus on the last radio button in the group. If a radio button is already selected, that selected button should be focused instead of the last one.
• Radio Selection: A radio button can be selected using the Space, or arrow keys.
• Arrow Keys:
• Arrow Down or Right: Pressing the Down Arrow or Right Arrow should move the focus in a clockwise direction within the radio group.
• Arrow Up or Left: Pressing the Up Arrow or Left Arrow should move the focus in a counterclockwise direction within the radio group.

Notes to Reviewers

Please note that the CSS variables, code comments, test cases, and updated documentation will be added asap.

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