Disabled block field items

[cbratschi]

ACF Pro 6.5 just added a very useful new feature: flexible content fields can be disabled in the UI and will be removed in all queries.

https://www.advancedcustomfields.com/blog/acf-pro-6-5-released/#disable-layouts-without-deleting-content

It would be great to have a similar feature in Payload blocks and therefore in Lexical blocks too. This feature is deeply integrated into the UI and query output. Therefore it's not easy to replicate it on a plugin level i.e. it has to be done in Payload core.

PS: some other introduced new features could be implemented too.

[cbratschi]

The new field could be named blockDisabled (boolean).