Improve copy of console command examples

[zanieb]

e.g.

$ uv foo

cannot be copy pasted without the leading $ in the documentation.

See PrefectHQ/prefect#9204 for a bunch of discussion about this problem and potential solutions.

A possible solution is to use bash syntax instead and omit the $ entirely, but this looses the context that a command is intended to be executed in a terminal :(