Emphasize "attached" signals and properties in the body of API description

This as an example:

https://doc.qt.io/qt-6/qml-qtquick-tableview.html#pooled-signal

The title and the description of the function, does not say anything about being an "attached" property. It's under "attached signals" section but it's confusing. Luckily, there are some code snippets in the same documentation about how to use this "attached" signal.

The suggestion is to search whole API documentation for attached signals and properties and make sure that there is a sign in descriptions or on the title to emphasize being an "attached" property/signal.