capitalize folder names and file names Same like class file names

src/AirGradient.h

@@ -1,17 +1,17 @@
 #ifndef _AIR_GRADIENT_H_
 #define _AIR_GRADIENT_H_
 
-#include "display/oled.h"
-#include "main/BoardDef.h"
-#include "main/HardwareWatchdog.h"
-#include "main/LedBar.h"
-#include "main/PushButton.h"
-#include "main/StatusLed.h"
-#include "pms/pms5003.h"
-#include "pms/pms5003t.h"
-#include "s8/s8.h"
-#include "sgp41/sgp41.h"
-#include "sht/sht.h"
+#include "Display/Display.h"
+#include "Main/BoardDef.h"
+#include "Main/HardwareWatchdog.h"
+#include "Main/LedBar.h"
+#include "Main/PushButton.h"
+#include "Main/StatusLed.h"
+#include "PMS/PMS5003.h"
+#include "PMS/PMS5003T.h"
+#include "S8/S8.h"
+#include "Sgp41/Sgp41.h"
+#include "Sht/Sht.h"
 
 /**
  * @brief Class with define all the sensor has supported by Airgradient. Each

src/Display/Display.cpp

@@ -1,6 +1,6 @@
-#include "oled.h"
-#include "../library/Adafruit_SH110x/Adafruit_SH110X.h"
-#include "../library/Adafruit_SSD1306_Wemos_OLED/Adafruit_SSD1306.h"
+#include "Display.h"
+#include "../Libraries/Adafruit_SH110x/Adafruit_SH110X.h"
+#include "../Libraries/Adafruit_SSD1306_Wemos_OLED/Adafruit_SSD1306.h"
 
 #define disp(func)                                                             \
   if (this->_boardType == DIY_BASIC) {                               \