[examples] Fixed shell build for nrfconnect (#34500)
Shell example build for nrfconnect was broken due to missing
sysbuild.conf file that enabled Matter.
diff --git a/examples/shell/nrfconnect/sysbuild.conf b/examples/shell/nrfconnect/sysbuild.conf
new file mode 100644
index 0000000..e63a92c
--- /dev/null
+++ b/examples/shell/nrfconnect/sysbuild.conf
@@ -0,0 +1,18 @@
+#
+# Copyright (c) 2024 Project CHIP 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
+#
+# http://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.
+#
+
+SB_CONFIG_MATTER=y
+SB_CONFIG_MATTER_OTA=n
