Add simple-run command

internal/cli/run.go

@@ -0,0 +1,20 @@
+package cli
+
+import (
+	"fmt"
+
+	"github.com/9seconds/mtg/v2/internal/utils"
+)
+
+type Run struct {
+	ConfigPath string `kong:"arg,required,type='existingfile',help='Path to the configuration file.',name='config-path'"` // nolint: lll
+}
+
+func (r *Run) Run(cli *CLI, version string) error {
+	conf, err := utils.ReadConfig(r.ConfigPath)
+	if err != nil {
+		return fmt.Errorf("cannot init config: %w", err)
+	}
+
+    return runProxy(conf, version)
+}