Add slog logging support and update error handling in various modules

include/log.h

@@ -0,0 +1,43 @@
+//
+// Created by claunia on 13/8/25.
+//
+
+#ifndef LIBAARUFORMAT_LOG_H
+#define LIBAARUFORMAT_LOG_H
+
+#include <stdarg.h>
+#include <stdio.h>
+
+// Uncomment to enable tracing
+// #define ENABLE_TRACE
+// Uncomment to use slog instead of stderr
+// #define USE_SLOG
+
+#ifdef ENABLE_TRACE
+#ifdef USE_SLOG
+#include "slog.h"
+
+#define TRACE(fmt, ...) slog_trace(fmt, ##__VA_ARGS__)
+#else
+#define TRACE(fmt, ...) fprintf(stderr, "[TRACE] %s:%d:%s(): " fmt "\n", __FILE__, __LINE__, __func__, ##__VA_ARGS__)
+#endif
+#else
+#define TRACE(fmt, ...)
+#endif
+
+#include <stdarg.h>
+#include <stdio.h>
+
+#ifdef ENABLE_FATAL
+#ifdef USE_SLOG
+#include "slog.h"
+
+#define FATAL(fmt, ...) slog_fatal(fmt, ##__VA_ARGS__)
+#else
+#define FATAL(fmt, ...) fprintf(stderr, "[FATAL] %s:%d:%s(): " fmt "\n", __FILE__, __LINE__, __func__, ##__VA_ARGS__)
+#endif
+#else
+#define FATAL(fmt, ...)
+#endif
+
+#endif  // LIBAARUFORMAT_LOG_H