Add the ability to specify `.bib` file on a per-note basis

[mkdjr]

Is your feature request related to a problem? Please describe.
I would like to keep my .bib files separated based by project rather than using one universal library. To use this plugin with this workflow I have switch the "library file path" depending on which project I'm working on.

Describe the solution you'd like
The relative path to the bibliography file can be listed in a bibliography frontmatter field, akin to Pandoc and by extension Quarto. This is used as the "library file path" for the note, so long as it is active.