refactor: we don't wanna export pkg/oonimkall/tasks (#216)

* doc: merge the engine and the cli readmes

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

* refactor: we don't wanna export pkg/oonimkall/tasks

See https://github.com/ooni/probe/issues/1335

pkg/oonimkall/.gitignore

@@ -0,0 +1 @@
+/testdata

pkg/oonimkall/internal/tasks/eventemitter_test.go

@@ -3,7 +3,7 @@ package tasks_test
 import (
 	"testing"
 
-	"github.com/ooni/probe-cli/v3/pkg/oonimkall/tasks"
+	"github.com/ooni/probe-cli/v3/pkg/oonimkall/internal/tasks"
 )
 
 func TestDisabledEvents(t *testing.T) {

pkg/oonimkall/internal/tasks/runner_integration_test.go

@@ -9,7 +9,7 @@ import (
 	"testing"
 	"time"
 
-	"github.com/ooni/probe-cli/v3/pkg/oonimkall/tasks"
+	"github.com/ooni/probe-cli/v3/pkg/oonimkall/internal/tasks"
 )
 
 func TestRunnerMaybeLookupBackendsFailure(t *testing.T) {

pkg/oonimkall/task.go

@@ -45,7 +45,7 @@ import (
 
 	"github.com/ooni/probe-cli/v3/internal/engine/atomicx"
 	"github.com/ooni/probe-cli/v3/internal/engine/runtimex"
-	"github.com/ooni/probe-cli/v3/pkg/oonimkall/tasks"
+	"github.com/ooni/probe-cli/v3/pkg/oonimkall/internal/tasks"
 )
 
 // Task is an asynchronous task running an experiment. It mimics the

pkg/oonimkall/task_integration_test.go

@@ -10,7 +10,7 @@ import (
 	"github.com/google/go-cmp/cmp"
 	"github.com/ooni/probe-cli/v3/internal/engine/model"
 	"github.com/ooni/probe-cli/v3/pkg/oonimkall"
-	"github.com/ooni/probe-cli/v3/pkg/oonimkall/tasks"
+	"github.com/ooni/probe-cli/v3/pkg/oonimkall/internal/tasks"
 )
 
 type eventlike struct {