restructure and include Makefile

internal/runner/runner.go

@@ -0,0 +1,28 @@
+package cmd
+
+import (
+	"context"
+	"fmt"
+	"os/exec"
+)
+
+type Runner interface {
+	Run(context.Context, string, ...any) ([]byte, error)
+}
+
+type ZRunner struct {
+	Prog string
+	Args []string
+}
+
+func (runner *ZRunner) Run(ctx context.Context, command string, formatArgs ...any) ([]byte, error) {
+	var subArgs string
+	if len(formatArgs) > 0 {
+		subArgs = fmt.Sprintf(command, formatArgs...)
+	} else {
+		subArgs = command
+	}
+	args := append(runner.Args, subArgs)
+	cmd := exec.Command(runner.Prog, args...)
+	return cmd.CombinedOutput()
+}