FBI now has preleminary QR install support, as such, further development efforts will be focused toward extending the MEGA file (and eventually folder support) to that application instead.
Usage: Point CAM1 (rear facing, right side) at a QR code containing the URL of the .cia you would like to install. Usually about 9" away works well for a QR of normal size, but your device may differ.
You can use both regular http/https links, as well as direct .cia file links on Mega.nz.
Compiling this requires my fork of citrus which provides an overloaded version of ctr::app::install() that implements callbacks, quirc for QR decoding, jsmn for JSON, and mbedTLS for AES/base64.