Consolidate software timers into superloop

Remove the deprecated hal wrapper and centralize software-timer definitions in lib-superloop. Updates:

- common/make/gd32/Includes.mk: adjust include path to point to lib-superloop/include/superloop.
- Deleted lib-hal/include/softwaretimers.h (removed duplicate wrapper that selected between FreeRTOS and superloop implementations).
- lib-superloop/include/superloop/softwaretimers.h: add kSoftwareTimersMax and kTimerIdNone definitions and declare API.
- lib-superloop/src/softwaretimers.cpp: use kSoftwareTimersMax (instead of hal::kSoftwareTimersMax) for the timer pool and bounds check.

This consolidates timer constants and types into the superloop module and removes the redundant hal header to simplify include paths and reduce duplication.

Author: vanvught

common/make/gd32/Includes.mk

@@ -27,7 +27,7 @@ $(call set_if_present,CONFIG_USB_DEVICE_HID,USB_DEVICE_HID)
 ifdef FREE_RTOS
 	INCLUDES+=-I../FreeRTOS/FreeRTOS-Kernel/include
 else
-	INCLUDES+=-I../lib-superloop/include
+	INCLUDES+=-I../lib-superloop/include/superloop
 endif
 
 ifdef USB_HOST

lib-hal/include/softwaretimers.h

@@ -28,9 +28,18 @@
 
 #include <cstdint>
 
+static constexpr uint32_t kSoftwareTimersMax =
+#if defined(CONFIG_HAL_TIMERS_COUNT)
+    CONFIG_HAL_TIMERS_COUNT;
+#else
+    12;
+#endif
+
 typedef int32_t TimerHandle_t;
 typedef void (*TimerCallbackFunction_t)(TimerHandle_t);
 
+inline constexpr TimerHandle_t kTimerIdNone = -1;
+
 TimerHandle_t SoftwareTimerAdd(uint32_t interval_millis, const TimerCallbackFunction_t kCallback);
 bool SoftwareTimerDelete(TimerHandle_t& id);
 bool SoftwareTimerChange(TimerHandle_t id, uint32_t interval_millis);

lib-superloop/include/superloop/softwaretimers.h

@@ -52,7 +52,7 @@ struct Timer {
     TimerCallbackFunction_t callback_function; ///< Callback invoked on expiry; must be non-null.
 };
 
-static Timer s_timers[hal::kSoftwareTimersMax]; ///< Timer storage pool.
+static Timer s_timers[kSoftwareTimersMax]; ///< Timer storage pool.
 static uint32_t s_timers_count = 0;             ///< Number of active timers (0..hal::SOFTWARE_TIMERS_MAX).
 static int32_t s_next_id = 0;                   ///< Monotonically increasing ID source (may wrap, see notes).
 static uint32_t s_timer_current = 0;            ///< bRound-robin cursor for SoftwareTimerRun().
@@ -72,7 +72,7 @@ TimerHandle_t SoftwareTimerAdd(uint32_t interval_millis, const TimerCallbackFunc
     DEBUG_ENTRY();
     DEBUG_PRINTF("s_timers_count=%u", s_timers_count);
 
-    if (s_timers_count >= hal::kSoftwareTimersMax) {
+    if (s_timers_count >= kSoftwareTimersMax) {
         Error(__func__, "Max timer limit reached");
         return -1;
     }