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).

wpimath/src/main/native/cpp/geometry/Translation2d.cpp

@@ -48,7 +48,9 @@ Translation2d& Translation2d::operator-=(const Translation2d& other) {
   return *this;
 }
 
-Translation2d Translation2d::operator-() const { return {-m_x, -m_y}; }
+Translation2d Translation2d::operator-() const {
+  return {-m_x, -m_y};
+}
 
 Translation2d Translation2d::operator*(double scalar) const {
   return {scalar * m_x, scalar * m_y};