Create OnePasswordItem API and controller

Command executed: `operator-sdk create api --version v1 --kind OnePasswordItem --resource --controller`
`--group` flag is skipped because we don't have a group in the previous version of the operator and we want to make things consistent and not bring any breaking changes.

main.go

@@ -18,6 +18,9 @@ import (
 	ctrl "sigs.k8s.io/controller-runtime"
 	"sigs.k8s.io/controller-runtime/pkg/healthz"
 	"sigs.k8s.io/controller-runtime/pkg/log/zap"
+
+	onepasswordcomv1 "github.com/1Password/onepassword-operator/api/v1"
+	"github.com/1Password/onepassword-operator/controllers"
 	//+kubebuilder:scaffold:imports
 )
 
@@ -29,6 +32,7 @@ var (
 func init() {
 	utilruntime.Must(clientgoscheme.AddToScheme(scheme))
 
+	utilruntime.Must(onepasswordcomv1.AddToScheme(scheme))
 	//+kubebuilder:scaffold:scheme
 }
 
@@ -73,6 +77,13 @@ func main() {
 		os.Exit(1)
 	}
 
+	if err = (&controllers.OnePasswordItemReconciler{
+		Client: mgr.GetClient(),
+		Scheme: mgr.GetScheme(),
+	}).SetupWithManager(mgr); err != nil {
+		setupLog.Error(err, "unable to create controller", "controller", "OnePasswordItem")
+		os.Exit(1)
+	}
 	//+kubebuilder:scaffold:builder
 
 	if err := mgr.AddHealthzCheck("healthz", healthz.Ping); err != nil {