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/RunCommand.cpp

@@ -18,4 +18,6 @@ RunCommand::RunCommand(std::function<void()> toRun,
   AddRequirements(requirements);
 }
 
-void RunCommand::Execute() { m_toRun(); }
+void RunCommand::Execute() {
+  m_toRun();
+}