ConcatStringsArrays flattens each []string in the arguments into a string.

EnsureAbsolutePathFromWorkspace returns path if path is absolute; otherwise it is interpretted as relative to workspaceRoot, and filepath.Join(workspaceRoot, path) is returned.

LookupEnvOrDefault returns os.LookupEnv(key) or defaultValue if the key is not in the environment.

SignalCancelledContext returns a child context and cancellation function.