Set code style to default IDE code style (#4516)

Author: fkistner

.gitignore

@@ -38,7 +38,7 @@ gradle-app.setting
 
 # local project files
 lib/
-.idea/
+.idea/*
 proto/compiler/protoc-artifacts
 proto/compiler/tests
 
@@ -71,4 +71,7 @@ compile_commands.json
 .clangd/
 
 # googletest framework used by runtime tests
-runtime/googletest/
+runtime/googletest/
+
+# code style
+!.idea/codeStyles/