refactor(ast2ir): 重构ABI类型系统并修复union结构问题

- 将scc_ast_def.h中的attr_of从union改为struct以修复结构定义问题
- 添加type_abi依赖到ast2ir模块的cbuild.toml配置文件中
- 重命名scc_ast2ir.h中的abi字段为type_abi，并更新相关初始化函数签名
- 移除废弃的scc_abi_type.h和相关平台ABI头文件
- 添加辅助函数is_variadic_marker和fixed_param_count用于处理可变参数
- 添加数组和聚合类型初始化的辅助函数

runtime/scc_core/include/scc_core_impl.h

@@ -4,9 +4,12 @@
 #include "scc_core_pal.h"
 #include "scc_core_type.h"
 
-#define scc_malloc scc_pal_malloc
-#define scc_calloc scc_pal_calloc
-#define scc_realloc scc_pal_realloc
+void *__scc_malloc(size_t size);
+void *__scc_calloc(size_t count, size_t size);
+void *__scc_realloc(void *ptr, size_t new_size);
+#define scc_malloc __scc_malloc
+#define scc_calloc __scc_calloc
+#define scc_realloc __scc_realloc
 #define scc_free scc_pal_free
 #define scc_exit scc_pal_exit
 #define scc_abort scc_pal_abort

runtime/scc_core/src/core_impl.c

@@ -5,6 +5,30 @@
 #define __SCC_LOG_IMPL_IMPORT_SRC__
 #include <scc_core_log.h>
 
+void *__scc_malloc(size_t size) {
+    void *p = scc_pal_malloc(size);
+    if (!p) {
+        LOG_FATAL("__scc_malloc: allocation failed (%zu bytes)", size);
+    }
+    return p;
+}
+
+void *__scc_calloc(size_t count, size_t size) {
+    void *p = scc_pal_calloc(count, size);
+    if (!p) {
+        LOG_FATAL("__scc_calloc: allocation failed (%zu x %zu)", count, size);
+    }
+    return p;
+}
+
+void *__scc_realloc(void *ptr, size_t new_size) {
+    void *p = scc_pal_realloc(ptr, new_size);
+    if (!p) {
+        LOG_FATAL("__scc_realloc: allocation failed (%zu bytes)", new_size);
+    }
+    return p;
+}
+
 void putchar_(char ch) {
     (void)ch;
     LOG_FATAL("you can't use printf.c directly");