Add weighted mean aggregation to DataTable

[hughess]

Description

Adds weightedMean as a total aggregation in DataTable/Column. Should be used with weightCol to specify the column to pull the weight values from for the calculation. If no weightCol supplied, a weight of 1 is used for all values, resulting in the same output as the mean aggregation.

<DataTable data={countries} totalRow=true rows=5>
  <Column id=country/>
  <Column id=gdp_usd totalAgg=sum/>
  <Column id=gdp_growth totalAgg=weightedMean weightCol=gdp_usd fmt='pct2'/>
  <Column id=population totalAgg=mean fmt='#,##0"M"'/>
</DataTable>

Checklist

• For UI or styling changes, I have added a screenshot or gif showing before & after
• I have added a changeset
• I have added to the docs where applicable

[changeset-bot]

🦋 Changeset detected

Latest commit: 008ce92

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 5 packages

Name	Type
@evidence-dev/core-components	Patch
evidence-docs	Patch
@evidence-dev/components	Patch
@evidence-dev/evidence	Patch
evidence-test-environment	Patch

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[ItsMeBrianD]

Not sure why all of the changesets are showing as deleted with this branch, this might need to have origin/next merged in

[archiewood]

Can this be merged

[hughess]

Just attempting to get rid of the deleted changesets then will be good to go

[hughess]

@ItsMeBrianD i think this might be caused by main not being merged back into next?

[hughess]

I'm at a loss for how to remove the deleted changesets - I've merged with next and synced, but those changes don't seem to be taking effect

[archiewood]

solved?

[hughess]

That did most of it! Now I’m just not sure why Cormick’s changes are showing up here - they were already merged to next