Added the namespace knative-operator (knative#1777)

config/000-namespace.yaml

@@ -0,0 +1,21 @@
+# Copyright 2024 The Knative Authors
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+apiVersion: v1
+kind: Namespace
+metadata:
+  name: knative-operator
+  labels:
+    app.kubernetes.io/name: knative-operator
+    app.kubernetes.io/version: devel