Touch and display driver subsystems reworked (and more) (#302)

- Refactored `TouchDevice`: it can now start/stop LVGL separately, and it has an optional `TouchDriver` interface
- Refactored `DisplayDevice`: it can now start/stop LVGL separately, and it has an optional `DisplayDriver` interface
- Updated all boards and drivers for above changes
- LVGL can now be stopped and (re)started on the fly
- Fixed issues with restarting Gui and Statusbar services
- Refactored `Gui` service to be class and renamed `Gui` to `GuiService`
- Fixed `Statusbar` service: forgot to deregister one of the icons
- Updated `esp_lcd_st7701` to v1.1.3
- `lv_textarea_create()` now automatically registers the hardware keyboard hooks (by wrapping the function)
- Fixed and updated `tactility.py`
- Cleanup of a lot of code
- `BootInitLvglBegin` and `BootInitLvglEnd` are replaced by `LvglStarted` and `LvglStopped`.
- Introduced `tt::service::State` which is accessible via `tt::service::getState()` (and internally via `ServiceInstance`)
- Started replacing `#define TAG` with `constexpr auto TAG = "..";`

Boards/LilygoTdeck/Source/hal/TdeckKeyboard.cpp

@@ -7,7 +7,7 @@
 #define TDECK_KEYBOARD_I2C_BUS_HANDLE I2C_NUM_0
 #define TDECK_KEYBOARD_SLAVE_ADDRESS 0x55
 
-static inline bool keyboard_i2c_read(uint8_t* output) {
+static bool keyboard_i2c_read(uint8_t* output) {
     return tt::hal::i2c::masterRead(TDECK_KEYBOARD_I2C_BUS_HANDLE, TDECK_KEYBOARD_SLAVE_ADDRESS, output, 1, 100 / portTICK_PERIOD_MS);
 }
 
@@ -43,7 +43,7 @@ static void keyboard_read_callback(TT_UNUSED lv_indev_t* indev, lv_indev_data_t*
     last_buffer = read_buffer;
 }
 
-bool TdeckKeyboard::start(lv_display_t* display) {
+bool TdeckKeyboard::startLvgl(lv_display_t* display) {
     deviceHandle = lv_indev_create();
     lv_indev_set_type(deviceHandle, LV_INDEV_TYPE_KEYPAD);
     lv_indev_set_read_cb(deviceHandle, &keyboard_read_callback);
@@ -52,7 +52,7 @@ bool TdeckKeyboard::start(lv_display_t* display) {
     return true;
 }
 
-bool TdeckKeyboard::stop() {
+bool TdeckKeyboard::stopLvgl() {
     lv_indev_delete(deviceHandle);
     deviceHandle = nullptr;
     return true;