Allow the template path to be overwritten for sections via a variable

[jassok]

When creating a new section, if the section is a brandNewSection it will auto create the template path to {handle}/_entry

This section is hard coded within craft/vendor/craftcms/cms/src/templates/settings/sections/_edit.html via a javascript function:

new Craft.UriFormatGenerator('#name', '#sites tr[data-id="{{ site.handle }}"] input[name$="[template]"]', { suffix: '/_entry' })

Request would be to allow the default path to be controllable via a setting either in general.php or .env to allow for something like pages/{handle}/_entry or {handle}/index to be the default template.