Consider implementing biblatex's origdate

[ironupiwada]

Referring to thread #264, I would like to request including the origdate field when converting BibLaTeX to Hayagriva. I'm using the APA 7th ed. style (albeit with a slightly modified CSL file), and the origdate field is not being considered at all when formatting bibliographic entries.
What I propose is an implementation where, for example, this BibLaTeX code:
origdate = {1925}
would be recognized by Hayagriva as:

parent:
    parent:
        type: original
        date: 1925

The double use of parent: would allow the origdate to be used not only in book entries, but also in chapters and articles, for example.