chore: add sonar properties

Author: erzz

sonar-project.properties

@@ -0,0 +1,12 @@
+sonar.projectKey=erzz_codeclimate-standalone
+sonar.organization=erzz
+
+# This is the name and version displayed in the SonarCloud UI.
+#sonar.projectName=codeclimate-standalone
+#sonar.projectVersion=1.0
+
+# Path is relative to the sonar-project.properties file. Replace "\" by "/" on Windows.
+#sonar.sources=.
+
+# Encoding of the source code. Default is default system encoding
+#sonar.sourceEncoding=UTF-8