Various fixes and improvements (#269)

- Bump version for next release
- Fix default gamma for CYD 2432S032C
- Remember gamma curve setting from Display settings app
- Add UART to Core2 (still has no voltage on Grove port, though)
- LVGL performance improvements: pin to second core and set task priority to "critical"
- Fix build warnings, including deprecations
- Removed deprecated `Thread` constructor
- Fix WaveShare S3 display: Some displays would show a white screen at 12MHz, so I'm putting it back to the
official config values.

Tactility/Include/Tactility/app/display/DisplaySettings.h

@@ -5,8 +5,15 @@
 namespace tt::app::display {
 
 void setBacklightDuty(uint8_t value);
-uint8_t getBacklightDuty();
+
+bool getBacklightDuty(uint8_t& duty);
+
+void setGammaCurve(uint8_t curveIndex);
+
+bool getGammaCurve(uint8_t& curveIndex);
+
 void setRotation(lv_display_rotation_t rotation);
+
 lv_display_rotation_t getRotation();
 
 } // namespace