Move ./internal/oidcclient to ./pkg/oidcclient.

This will allow it to be imported by Go code outside of our repository, which was something we have planned for since this code was written.

Signed-off-by: Matt Moyer <moyerm@vmware.com>

cmd/pinniped/cmd/login_oidc.go

@@ -18,8 +18,8 @@ import (
 	clientauthenticationv1beta1 "k8s.io/client-go/pkg/apis/clientauthentication/v1beta1"
 	"k8s.io/klog/v2/klogr"
 
-	"go.pinniped.dev/internal/oidcclient"
-	"go.pinniped.dev/internal/oidcclient/filesession"
+	"go.pinniped.dev/pkg/oidcclient"
+	"go.pinniped.dev/pkg/oidcclient/filesession"
 )
 
 //nolint: gochecknoinits

cmd/pinniped/cmd/login_oidc_test.go

@@ -12,7 +12,7 @@ import (
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 
 	"go.pinniped.dev/internal/here"
-	"go.pinniped.dev/internal/oidcclient"
+	"go.pinniped.dev/pkg/oidcclient"
 )
 
 func TestLoginOIDCCommand(t *testing.T) {