RmtHI: Add missing includes

While these were both fortunately included in Arduino.h, as
@coderabbitai suggests, it's best practice to be explicit for anything
one uses directly.

lib/NeoESP32RmtHI/src/NeoEsp32RmtHIMethod.cpp

@@ -31,6 +31,8 @@ License along with NeoPixel.  If not, see
 
 #if defined(ARDUINO_ARCH_ESP32)
 
+#include <algorithm>  
+#include "esp_idf_version.h"
 #include "NeoEsp32RmtHIMethod.h"
 #include "soc/soc.h"
 #include "soc/rmt_reg.h"