add build flags to bao-console

[bunnie]

This time with rebasing.

two flags are added:

with-pddb - puts the PDDB commands into the console
battery-readout - turns on the periodic battery readout

I bet this has conflicts with your branch @samchin. Please let me know if some changes on my side would reduce merge conflicts.

[samchin]

I tested the -- feature "battery-readout" which worked as expected.

I compiled the -- feature "with-pddb" which also worked.

[samchin]

Also if you change bao.sh to have cargo xtask baosec --feature "mpw" --loader-feature "cramium-mpw" "$@", you can call: ./baosec.sh --feature "battery-readout" from the command line