Add Linter to Stage Command

[jribbink]

Instructions

Issue To Be Solved

We should add the Cadence potentially as a preflight check that contracts going to be updated to C1.0 are valid/provide feedback if not. This is a sanity check as well as a useful feedback touchpoint for developers.

[jribbink]

Closing this because it's probbly not necessary. The update validator & Cadence checker do a pretty good job already and I think naturally users will try to solve these in VSCode, etc. and get linting info there. So it's probably unnecessary to bloat this commnd further/incur the technical burden.