Refactor NVS and WiFi handlers for improved memory management and logging

- Updated KVStorageHandler interface to use std::string instead of char* for key-value operations.
- Enhanced NVSStorageHandler to utilize ESP_LOG for error and info messages instead of printf.
- Refactored WifiHandler to manage WiFi credentials using JSON format for better structure and storage.
- Replaced raw pointers with std::unique_ptr in WifiHandler and NetworkHandler for automatic memory management.
- Removed unused TouchHandler and EInkTouchHandler classes to clean up the codebase.
- Adjusted CMakeLists.txt to remove unnecessary include directories.
- Updated lv_conf.h to enable FreeRTOS and gesture recognition features.

main/lv_conf.h

@@ -109,7 +109,8 @@
    * - LV_OS_MQX
    * - LV_OS_SDL2
    * - LV_OS_CUSTOM */
-#define LV_USE_OS   LV_OS_NONE
+   // #define LV_USE_OS   LV_OS_NONE
+#define LV_USE_OS   LV_OS_FREERTOS
 
 #if LV_USE_OS == LV_OS_CUSTOM
 #define LV_OS_CUSTOM_INCLUDE <stdint.h>
@@ -574,7 +575,8 @@
 
 /* Enable the multi-touch gesture recognition feature */
 /* Gesture recognition requires the use of floats */
-#define LV_USE_GESTURE_RECOGNITION 0
+// #define LV_USE_GESTURE_RECOGNITION 0
+#define LV_USE_GESTURE_RECOGNITION 1
 
 /*=====================
  *  COMPILER SETTINGS
@@ -617,7 +619,8 @@
 #define LV_ATTRIBUTE_EXTERN_DATA
 
 /** Use `float` as `lv_value_precise_t` */
-#define LV_USE_FLOAT            0
+// #define LV_USE_FLOAT            0
+#define LV_USE_FLOAT            1
 
 /** Enable matrix support
  *  - Requires `LV_USE_FLOAT = 1` */
@@ -1189,7 +1192,8 @@
 
 /** 1: Enable Pinyin input method
  *  - Requires: lv_keyboard */
-#define LV_USE_IME_PINYIN 0
+ // #define LV_USE_IME_PINYIN 0
+#define LV_USE_IME_PINYIN 1
 #if LV_USE_IME_PINYIN
  /** 1: Use default thesaurus.
   *  @note  If you do not use the default thesaurus, be sure to use `lv_ime_pinyin` after setting the thesaurus. */
@@ -1436,10 +1440,12 @@
 *======================*/
 
 /** Enable examples to be built with the library. */
-#define LV_BUILD_EXAMPLES 1
+// #define LV_BUILD_EXAMPLES 1
+#define LV_BUILD_EXAMPLES 0
 
 /** Build the demos */
-#define LV_BUILD_DEMOS 1
+// #define LV_BUILD_DEMOS 1
+#define LV_BUILD_DEMOS 0
 
 /*===================
  * DEMO USAGE