docs: add required docs and codeowners config

.github/CODEOWNERS

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+# SPDX-FileCopyrightText: 2025 Alliander N.V.
+#
+# SPDX-License-Identifier: Apache-2.0
+
+# All members of the @com-pas/Alliander team are code owners for this repository
+
+* @com-pas/Alliander

CODE_OF_CONDUCT.md

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+<!--
+SPDX-FileCopyrightText: 2025 Alliander N.V.
+
+SPDX-License-Identifier: Apache-2.0
+-->
+
+# Code of Conduct
+
+This project follows the CoMPAS Code of Conduct. Please see the [Code of Conduct documentation](https://com-pas.github.io/contributing/#code-of-conduct) for details on our community standards and expectations.

CONTRIBUTING.md

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+<!--
+SPDX-FileCopyrightText: 2021 Alliander N.V.
+
+SPDX-License-Identifier: Apache-2.0
+-->
+
+# Contributing
+
+Please refer to the [CoMPAS Contributing Guide](https://com-pas.github.io/contributing/) for contribution guidelines.

GOVERNANCE.md

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+<!--
+SPDX-FileCopyrightText: 2025 Alliander N.V.
+
+SPDX-License-Identifier: Apache-2.0
+-->
+
+# Governance
+
+This project follows the CoMPAS governance model. See the [governance documentation](https://com-pas.github.io/contributing/GOVERNANCE.html) for details.

SUPPORT.md

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+<!--
+SPDX-FileCopyrightText: 2025 Alliander N.V.
+
+SPDX-License-Identifier: Apache-2.0
+-->
+
+# Support
+
+For support and help, see the [CoMPAS contributing guide](https://com-pas.github.io/contributing/SUPPORT.html).