Option to ignore frontmatter in ledger file completely

[gauthamrmn]

Is your feature request related to a problem? Please describe.
I use frontmatter a lot in my vault to organize my notes, and I tried adding some frontmatter to my ledger file today. Everything functions, but I get a ParsingError for an erroneous transaction.

Describe the solution you'd like
I'd like there to be a setting in the plugin that would ignore text written between two sets of "---"'s that are on their own separate lines (and the lines themselves), since that is what's common to all frontmatter. Then this way, ledger would not even attempt to parse, so the error wouldn't show up.

Describe alternatives you've considered
I suppose there could also just be an option to disable error reporting on the dashboard, but this seems like a little much.