chore: reorganize gnovm/cmd/gno (#3587) #318

Job	Run time
gno2go (1.22.x)	56s
lint (1.22.x)	57s
mod-tidy (1.22.x)	2m 29s
test (1.22.x)	2m 28s
Run gno fmt on examples / fmt	31s
Check generated files are up to date / generated	12s
	7m 33s

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