Initial sample terms-and-conditions app

```bash
$ export ZAP_DEVELOPMENT_PATH=/workspace/zap

$ /workspace/connectedhomeip/scripts/tools/zap/generate.py examples/terms-and-conditions-app/common/terms-and-conditions-app.zap

$ gn gen --check --fail-on-unused-args --export-compile-commands --root=/workspace/connectedhomeip/examples/terms-and-conditions-app/linux \
    --args="chip_config_network_layer_ble=false chip_enable_wifi=false is_debug=true chip_config_tc_required_acknowledgements=1 chip_config_tc_required_acknowledgements_version=1" \
    /workspace/connectedhomeip/out/examples/terms-and-conditions-app

$ ninja -C /workspace/connectedhomeip/out/examples/terms-and-conditions-app
```

examples/terms-and-conditions-app/common/BUILD.gn

@@ -0,0 +1,22 @@
+# 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.
+
+import("//build_overrides/chip.gni")
+
+import("${chip_root}/src/app/chip_data_model.gni")
+
+chip_data_model("common") {
+  zap_file = "terms-and-conditions-app.zap"
+  is_server = true
+}