chore(actions): add icon leads notification for calcite-ui-icons requests

[geospatialem]

Related Issue: #9922

Summary

Add automation to issues when the calcite-ui-icons label is added, where Icon team leads will receive an @ notification via a comment, similar to the new component label automation from the notifyAboutNewComponent script.

cc @allieorth, @arowles

[benelan]

Why are tagging icon designers in a comment instead of assigning them (or the @Esri/calcite-icon-designers team) to the issue? I think designers would be notified either way, but it assigning would reduce noise for the issue author.

Edit: Actually you can't assign a team to an issue. But assigning the individual designer(s) is still an option.

[geospatialem]

Why are tagging icon designers in a comment instead of assigning them (or the @Esri/calcite-icon-designers team) to the issue? I think designers would be notified either way, but it assigning would reduce noise for the issue author.

Edit: Actually you can't assign a team to an issue. But assigning the individual designer(s) is still an option.

If we'd rather assign issues to the team, can alter the automation - the intent was to be similar to our new component and spike complete notifications, where:

• Icon leads would be notified and could review the request
• If the Icon team would like to proceed with the request, they could assign themselves to follow-up with the requestor once the icon(s) are added
• If the Icon team does not wish to proceed with the request, the issue would be closed with a response to the requestor