Need tooltips of table header when header text ellipsized.

[kong0102]

• I have searched the issues of this repository and believe that this is t a duplicate.

What problem does this feature solve?

Show full content of ellipsized header text.

What does the proposed API look like?

[tangjinzhou]

use headerCell slot custom header cell.
like https://next.antdv.com/components/table#components-table-demo-basic

[github-actions]

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