Add ink

[Flaque]

This is mostly a rewrite to change as much of the string parsing as we can to ink, while cleaning up the CLI along the way.

We've redone sf orders to be easier to be a bit nicer.

$ sf orders ls --public

↑ buy ordr_FW6wCEr1JnTRjWKd (filled)
8 h100i $16.00/gpu/hr 3h $6/total
aug 27 8:00 pm → aug 27 11:00 pm

↑ buy ordr_FW6wCEr1JnTQaJhm (filled)
8 h100i $15.96/gpu/hr 1h54m $3.79/total
aug 27 6:06 pm → aug 27 8:00 pm

↑ buy ordr_FW6wCEr1JnTP1MEZ (filled)
8 h100i $47.43/gpu/hr 1h7m $6.62/total
aug 27 4:53 pm → aug 27 6:00 pm

↑ buy ordr_FW6wCEr1JnTMLxrX (filled)
8 h100i $67.44/gpu/hr 1h $8.43/total
aug 27 2:00 pm → aug 27 3:00 pm