Improving cv-date-picker

[yzzhuo]

Description
There is an accessibility problem in the cv-date-picker component regarding its use of ARIA roles. Currently, the component assigns role="datepicker" to the input element, but this is not a valid ARIA role according to the WAI-ARIA specification. This results in a critical accessibility violation flagged by tools like Axe.

Expectation
Ensure the component fully adheres to WCAG 2.2 standards.

Plans:

• Update accessibility of the role value:
  Suggested by https://www.w3.org/WAI/ARIA/apg/patterns/combobox/examples/combobox-datepicker/, If necessary, replace it with a valid ARIA role, such as role="combobox", and include proper attributes like aria-expanded, aria-controls.

[github-actions]

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