FR: Prepend Multiple Lines instead of "Header Text"

[chrisgrieser]

This would enable us to insert a yaml-header in every text of notes created by the explosion mode. Basically, a template for the exploding-notes 💥

This in turn enables the dataview plugin to process the all the extracted highlights, which will create great synergistic value, as the dataview plugin by itself is not able to process blocks / parts of note contents, but only the metadata of a note.