chore: add setup script

Added a setup script in scripts/ to configure Git to use the commit
message template and added a reference to it to README.md.

README.md

@@ -13,6 +13,10 @@ You can install it using pip:
 pip install jcloud-docsgen --index-url https://repo.jcloud-services.ddns.net/simple/ --extra-index-url https://pypi.org/simple/
 ```
 
+## Setup
+
+Please execute `scripts/setup.sh` when cloning the repository to configure Git.
+
 ## Reference
 
 API reference and generated documentation can be found in [docs/reference](docs/reference).

scripts/setup.sh

@@ -0,0 +1,15 @@
+# Copyright 2026 jCloud
+
+# 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.
+
+git config --local commit.template .gitmessage