fix: add sonarcloud config

Author: vincentkoppen

sonar-project.properties

@@ -0,0 +1,13 @@
+# SPDX-FileCopyrightText: Contributors to the Power Grid Model project <[email protected]>
+#
+# SPDX-License-Identifier: MPL-2.0
+
+sonar.projectKey=PowerGridModel_power-grid-model-ds
+sonar.organization=powergridmodel
+
+
+sonar.sources=src
+sonar.tests=tests
+sonar.sourceEncoding=UTF-8
+sonar.python.version=3
+sonar.python.coverage.reportPaths=coverage.xml