feat: Add ability to migrate rtf files into SFM

[darcywong00]

A member had back translation files in rich text format (.rtf) and requested they be migrated to SFM.
This PR reuses toolbox.ts code to parse the rtf files with the additional option parameters:

-b (single rtf file)
-bd (directory of rtf files)
-bs (directory of directory of rtf files)

Note: UnRTF used to extract the raw text from .rtf only works on Linux.

Additional fixes:

• Fix expected number of verses in 3 John