make proto formatting match what platformio does

.idea/codeStyles/Project.xml

@@ -3,6 +3,11 @@
     <JetCodeStyleSettings>
       <option name="CODE_STYLE_DEFAULTS" value="KOTLIN_OFFICIAL" />
     </JetCodeStyleSettings>
+    <codeStyleSettings language="PROTO">
+      <indentOptions>
+        <option name="INDENT_SIZE" value="2" />
+      </indentOptions>
+    </codeStyleSettings>
     <codeStyleSettings language="XML">
       <indentOptions>
         <option name="CONTINUATION_INDENT_SIZE" value="4" />