add sonarcloud settings file

Author: Strooom

sonar-project.properties

@@ -0,0 +1,8 @@
+sonar.projectKey=Strooom_BME688-ML-v1-SW
+sonar.projectName=BME688-ML-v1-SW
+sonar.projectVersion=1.0
+sonar.sources=src, lib
+sonar.tests=test
+sonar.sourceEncoding=UTF-8
+sonar.host.url=SonarCloud.io
+sonar.cfamily.compile-commands=compile_commands.json