Time & date, system events and much more (#152)

## Time & Date
- Added time to statusbar widget
- Added Time & Date Settings app
- Added TimeZone app for selecting TimeZone
- Added `tt::time` namespace with timezone code

## Other changes

- Added `SystemEvent` to publish/subscribe to system wide (e.g. for init code, but also for time settings changes)
- Changed the way the statusbar widget works: now there's only 1 that gets shown/hidden, instead of 1 instance per app instance.
- Moved `lowercase()` function to new namespace: `tt::string`
- Increased T-Deck flash & PSRAM SPI frequencies to 120 MHz (from 80 MHz)
- Temporary work-around (+ TODO item) for LVGL stack size (issue with WiFi app)
- Suppress T-Deck keystroke debugging to debug level (privacy issue)
- Improved SDL dependency wiring in various `CMakeLists.txt`
- `Loader` service had some variables renamed to the newer C++ style (from previous C style)

Boards/LilygoTdeck/Source/Lvgl.cpp

@@ -8,8 +8,8 @@
 
 // LVGL
 // The minimum task stack seems to be about 3500, but that crashes the wifi app in some scenarios
-// At 4000, it crashes when the fps renderer is available
-#define TDECK_LVGL_TASK_STACK_DEPTH 8192
+// At 8192, it sometimes crashes when wifi-auto enables and is busy connecting and then you open WifiManage
+#define TDECK_LVGL_TASK_STACK_DEPTH 9216
 
 bool tdeck_init_lvgl() {
     static lv_disp_t* display = nullptr;

Boards/LilygoTdeck/Source/hal/TdeckDisplayConstants.h

@@ -4,7 +4,7 @@
 #define TDECK_LCD_PIN_CS GPIO_NUM_12
 #define TDECK_LCD_PIN_DC GPIO_NUM_11 // RS
 #define TDECK_LCD_PIN_BACKLIGHT GPIO_NUM_42
-#define TDECK_LCD_SPI_FREQUENCY 40000000
+#define TDECK_LCD_SPI_FREQUENCY 80000000
 #define TDECK_LCD_HORIZONTAL_RESOLUTION 320
 #define TDECK_LCD_VERTICAL_RESOLUTION 240
 #define TDECK_LCD_BITS_PER_PIXEL 16

Boards/LilygoTdeck/Source/hal/TdeckKeyboard.cpp

@@ -30,11 +30,11 @@ static void keyboard_read_callback(TT_UNUSED lv_indev_t* indev, lv_indev_data_t*
 
     if (keyboard_i2c_read(&read_buffer)) {
         if (read_buffer == 0 && read_buffer != last_buffer) {
-            TT_LOG_I(TAG, "Released %d", last_buffer);
+            TT_LOG_D(TAG, "Released %d", last_buffer);
             data->key = last_buffer;
             data->state = LV_INDEV_STATE_RELEASED;
         } else if (read_buffer != 0) {
-            TT_LOG_I(TAG, "Pressed %d", read_buffer);
+            TT_LOG_D(TAG, "Pressed %d", read_buffer);
             data->key = read_buffer;
             data->state = LV_INDEV_STATE_PRESSED;
         }

Boards/M5stackCore2/Source/InitLvgl.cpp

@@ -8,7 +8,7 @@
 // LVGL
 // The minimum task stack seems to be about 3500, but that crashes the wifi app in some scenarios
 // At 4000, it crashes when the fps renderer is available
-#define CORE2_LVGL_TASK_STACK_DEPTH 8192
+#define CORE2_LVGL_TASK_STACK_DEPTH 9216
 
 bool initLvgl() {
     const lvgl_port_cfg_t lvgl_cfg = {

Boards/M5stackCoreS3/Source/InitLvgl.cpp

@@ -8,7 +8,7 @@
 // LVGL
 // The minimum task stack seems to be about 3500, but that crashes the wifi app in some scenarios
 // At 4000, it crashes when the fps renderer is available
-#define CORE2_LVGL_TASK_STACK_DEPTH 8192
+#define CORE2_LVGL_TASK_STACK_DEPTH 9216
 
 bool initLvgl() {
     const lvgl_port_cfg_t lvgl_cfg = {

Boards/Simulator/CMakeLists.txt

@@ -11,13 +11,20 @@ if (NOT DEFINED ENV{ESP_IDF_VERSION})
         PRIVATE ${SOURCES}
         PUBLIC ${HEADERS}
     )
+
     target_link_libraries(Simulator
         PRIVATE Tactility
         PRIVATE TactilityCore
         PRIVATE TactilityHeadless
         PRIVATE lvgl
+        PRIVATE ${SDL2_LIBRARIES}
     )
 
+    if (NOT DEFINED ENV{SKIP_SDL})
+        find_package(SDL2 REQUIRED CONFIG)
+        target_link_libraries(Simulator PRIVATE ${SDL2_LIBRARIES})
+    endif()
+
     add_definitions(-D_Nullable=)
     add_definitions(-D_Nonnull=)
 

Boards/Simulator/Source/LvglTask.cpp

@@ -2,7 +2,6 @@
 
 #include "lvgl.h"
 #include "Log.h"
-#include "TactilityCore.h"
 #include "Thread.h"
 #include "lvgl/LvglSync.h"