Add full automotive RTOS project

Add kernel (Cortex-M0/M3/M4, Tricore, S32K, RISC-V ports), drivers,
middleware (CAN stack, diagnostics, safety), applications, board
support, build/test tooling, and documentation.

kernel/include/task.h

@@ -0,0 +1,58 @@
+/**
+ * @file task.h
+ * @brief Task management interface
+ */
+
+#ifndef TASK_H
+#define TASK_H
+
+#include "kernel.h"
+
+/* Internal Task Control Block */
+struct TaskControlBlock {
+    /* Task Identification */
+    char name[MAX_TASK_NAME_LENGTH];
+    TaskHandle_t self;
+    uint32_t task_id;
+
+    /* Task Function */
+    TaskFunction_t function;
+    void* parameters;
+
+    /* Stack Management */
+    uint32_t* stack_pointer;
+    uint32_t* stack_base;
+    uint32_t stack_size;
+    uint32_t stack_high_water_mark;
+
+    /* Scheduling Information */
+    TaskPriority_t priority;
+    TaskState_t state;
+    TickType_t period_ticks;
+    TickType_t last_wake_time;
+    TickType_t deadline_ticks;
+
+    /* Blocking Information */
+    TickType_t block_timeout;
+    void* blocked_on;
+
+    /* Statistics */
+    TaskStatistics_t statistics;
+
+    /* List Management */
+    struct TaskControlBlock* next;
+    struct TaskControlBlock* prev;
+
+    /* Architecture Specific */
+    uint32_t context[32];  /* CPU register context */
+};
+
+/* Internal Task Management Functions */
+void task_init(void);
+void task_switch_context(TaskHandle_t next_task);
+TaskHandle_t task_get_idle_task(void);
+void task_update_statistics(void);
+void task_check_stack_overflow(void);
+bool task_is_ready(TaskHandle_t task);
+
+#endif /* TASK_H */