make disabled a public property

[robertIsaac]

in angular app, protected property aren't be accessible

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[ilhan007]

Hello @robertIsaac from technical point of view, there is nothing wrong with the PR.

However, there is design reasons not to provide this property publicly. This was requested multiple times in the past, but the SAP Design and Accessibility teams, (that produce the specs that we follow) rejected having disabled items for accessibility reasons.

Few closed issues from the past

• [SF] TreeItem - Implement "disabled" property so that individual tree items can be prevented from being selected by the user #5254 (comment)
• [SF] TableRow - Implement "disabled" property so that individual rows can be prevented from being selected by the user when the table is in MultiSelect mode  #5649 (comment)

There is also one pending open request for the table, without progress

• [Feature Request]: Add disabled property to TableRowAction (again) #12806

@dobrinyonkov is there any new development on the topic with disabled items in general, or the old statements are still valid.