cmd/hakurei: move to cmd

Having it at the project root never made sense since the "ego" name was deprecated. This change finally addresses it.

Signed-off-by: Ophestra <cat@gensokyo.uk>

helper/container_test.go

@@ -53,5 +53,5 @@ func TestHelperInit(t *testing.T) {
 		return
 	}
 	sandbox.SetOutput(hlog.Output{})
-	sandbox.Init(hlog.Prepare, func(bool) { internal.InstallFmsg(false) })
+	sandbox.Init(hlog.Prepare, func(bool) { internal.InstallOutput(false) })
 }