Adds a new function, `wp_render_empty_block_template_warning`, that renders a warning for logged-in users when a block template is empty.
Reviewed by get_dave, richtabor.
Props vcanales, mikachan, peterwilsoncc, richtabor, get_dave, mrfoxtalbot, matveb, arielmaidana, seifradwane, annezazu.
Fixes#62053.
Built from https://develop.svn.wordpress.org/trunk@59449
git-svn-id: http://core.svn.wordpress.org/trunk@58835 1a063a9b-81f0-0310-95a4-ce76da25c4cd
mikachan