feat: pull request and merge request workflow (#98)

* feat(pr-workflow): add crd and controller for event handling

* chore: update manifests

---------

Co-authored-by: spoukke <sacha.bernheim@hey.com>

internal/controllers/terraformlayer/controller.go

@@ -153,3 +153,16 @@ func GetExponentialBackOffTime(DefaultRequeueAfter time.Duration, attempts int)
 	var x float64 = float64(attempts)
 	return time.Duration(int32(math.Exp(x))) * DefaultRequeueAfter
 }
+
+func ignorePredicate() predicate.Predicate {
+	return predicate.Funcs{
+		UpdateFunc: func(e event.UpdateEvent) bool {
+			// Ignore updates to CR status in which case metadata.Generation does not change
+			return e.ObjectOld.GetGeneration() != e.ObjectNew.GetGeneration()
+		},
+		DeleteFunc: func(e event.DeleteEvent) bool {
+			// Evaluates to false if the object has been confirmed deleted.
+			return !e.DeleteStateUnknown
+		},
+	}
+}