Charts: Add Geo Chart exports to package (#46438)

* Add Geo Chart exports to package.json

* Add changelog

* Revert removing hexToRgba from utils

* Refine test case for alpha value handling

Updated test description for alpha value acceptance.

* Remove double parentheses from test description

Co-authored-by: Copilot <[email protected]>

* Update hexToRgba doc for clarity

Co-authored-by: Copilot <[email protected]>

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Co-authored-by: Copilot <[email protected]>

Committed via a GitHub action: https://github.com/Automattic/jetpack/actions/runs/20735262581

Upstream-Ref: Automattic/jetpack@4126baf

Author: grzegorz-cp