Refactor handler to external

Moved task handler functions to external functions, signatures are in
tasks.h, each function has its own .c file in Src/tasks

STM32/CM7/Core/Src/tasks/crank.c

@@ -0,0 +1,25 @@
+// Copyright (C) 2026 Hector van der Aa <hector@h3cx.dev>
+// Copyright (C) 2026 Pierre Barbier <pierrebarbier741@gmail.com>
+// Copyright (C) 2026 Association Exergie <association.exergie@gmail.com>
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#include "cmsis_os2.h"
+#include "main.h"
+#include "ring_buffer.h"
+#include "tasks.h"
+#ifdef DEBUG
+#include "SEGGER_RTT.h"
+#endif
+
+void crankHandler(void *argument) {
+  for (;;) {
+    osThreadFlagsWait(0x01, osFlagsWaitAny, osWaitForever);
+#ifdef DEBUG
+    SEGGER_RTT_printf(0, "Crank pulse detected at: %lu\n\r",
+                      ringBufferRead(&state_g.crank_RB, 0));
+#endif /* ifdef DEBUG */
+    if (state_g.sync == SYNC_OK) {
+      // TODO complete algorithm for scheduling spark
+    }
+  }
+}