[FR] support search markdown headings in the notes

[simpzan]

It would be great if I can search headings in notes by prefixing the keyword with # char. for example:

1. keyword #introduction to search introduction in headings of all notes.
2. keyword markdown#introduction to search introduction heading in note with markdown in the title.

when use opening the searched note, heading parameter in https://vinzent03.github.io/obsidian-advanced-uri/actions/navigation can be used to open the note and navigate to the target heading.