shell: Improve wa

Have to be rebased on top of !6135 (merged)

Reformat wa to make it looks like umv and features some colors.

• Format wa/wu like umv
• Display position when axis is axis.state.DISABLED but not when axis.disabled
• Added some colors depending on the state of the axis
• This introduce workaround for elog_add, but that's something i want to fix later

Tested with

config.get("bad_mot")
config.get("dis_mot")
config.get("nan_mot")
wa()

FYI @claustre