TactilityC improvements (#359)

- Expose HAL Configuration's `UiScale`
- Updated docs
- Fix for `tt_timer_alloc()`
- Changed `enum class` to regular C `enum`
- Renamed enums (add prefix)
- Include `<stdbool.h>` where needed

TactilityC/Source/tt_init.cpp

@@ -7,6 +7,7 @@
 #include "tt_bundle.h"
 #include "tt_file.h"
 #include "tt_gps.h"
+#include "tt_hal.h"
 #include "tt_hal_device.h"
 #include "tt_hal_display.h"
 #include "tt_hal_gpio.h"
@@ -183,6 +184,7 @@ const esp_elfsym main_symbols[] {
     ESP_ELFSYM_EXPORT(tt_bundle_put_string),
     ESP_ELFSYM_EXPORT(tt_gps_has_coordinates),
     ESP_ELFSYM_EXPORT(tt_gps_get_coordinates),
+    ESP_ELFSYM_EXPORT(tt_hal_configuration_get_ui_scale),
     ESP_ELFSYM_EXPORT(tt_hal_device_find),
     ESP_ELFSYM_EXPORT(tt_hal_display_driver_alloc),
     ESP_ELFSYM_EXPORT(tt_hal_display_driver_draw_bitmap),