Move CameraServer and WPILib headers into their own folder

The old headers were moved into folders because doing so avoids polluting
the system include directories.

Folder names were also normalized to lowercase.

simulation/halsim_lowfi/src/main/native/cpp/NTProvider_RoboRIO.cpp

@@ -7,8 +7,8 @@
 
 #include "NTProvider_RoboRIO.h"
 
-#include <HAL/Ports.h>
-#include <MockData/RoboRioData.h>
+#include <hal/Ports.h>
+#include <mockdata/RoboRioData.h>
 
 void HALSimNTProviderRoboRIO::Initialize() {
   InitializeDefault(1, HALSIM_RegisterRoboRioAllCallbacks);