Add braces to C++ single-line loops and conditionals (NFC) (#2973)

This makes code easier to read and more consistent between C++ and Java.
Also update clang-format settings to always add a line break (even if no braces are used).

wpilibNewCommands/src/main/native/cpp/frc2/command/ProxyScheduleCommand.cpp

@@ -31,4 +31,6 @@ void ProxyScheduleCommand::Execute() {
   }
 }
 
-bool ProxyScheduleCommand::IsFinished() { return m_finished; }
+bool ProxyScheduleCommand::IsFinished() {
+  return m_finished;
+}