refactor: move more commands to internal/cmd (#207)

* refactor: move more commands to internal/cmd

Part of https://github.com/ooni/probe/issues/1335.

We would like all commands to be at the same level of engine
rather than inside engine (now that we can do it).

* fix: update .gitignore

* refactor: also move jafar outside engine

* We should be good now?

internal/engine/resources/resources.go

@@ -13,7 +13,7 @@ import (
 	"os"
 	"path/filepath"
 
-	"github.com/ooni/probe-cli/v3/internal/engine/internal/httpx"
+	"github.com/ooni/probe-cli/v3/internal/engine/httpx"
 	"github.com/ooni/probe-cli/v3/internal/engine/model"
 )