This patch changes the behavior of all commands to execute in the
current working directory of the platform root cue module. This gets
cue vet working well, otherwise it complains about fully qualified
paths. The cue command line expects the current working directory to be
a cue module.
The Env field of the Command schema wasn't implemented, so we remove it
from the schema. It's unclear it's necessary. Setting the environment
in the parent context should suffice for current use cases.
I'd like to add the kargo-demo repository to Unity to test evalv3, but
can't get a handle on the main function to wire up to testscript.
This patch fixes the problem by moving the MakeMain function to a public
package so the kargo-demo go module can import and call it using the go
mod tools technique.
