Add sample-simple, presubmit check
This package permits a Go application to implement subcommands support similar to what is supported by the ‘go’ tool.
The library is designed so that the test cases can run concurrently. Using global flags variables is discouraged to keep your program testable conccurently.
sample-simple for a barebone sample skeleton usable as-is.subcommands/subcommandstest for tools to help testing an application using subcommands. One of the main benefit is t.Parallel() just works, because subcommands help wrapping global variables.