Add touch gesture support and LilyGo T5 S3 board

Implements bottom-edge swipe-up gesture detection and delayed touch-select with tracking state. Adds isTouchTapCandidate() to distinguish taps from swipes. Includes LilyGo T5 S3 board configuration with USB CDC logging transport for boards where Serial operator bool reports false incorrectly.

lib/hal/HalGPIO.h

@@ -86,6 +86,9 @@ class HalGPIO {
   // 0..1 (panel native). For showing the pressed/selected element before release.
   bool wasTouchDown(float& nx, float& ny) const;
 
+  // True while a touch remains within tap slop; writes touch-down position and held time.
+  bool isTouchTapCandidate(float& nx, float& ny, unsigned long& heldMs) const;
+
   // Duration (ms) of the last touch contact, latched on release. Valid on the
   // release frame (alongside wasTouchTap). For tap-vs-long-press decisions.
   unsigned long lastTouchHeldMs() const;