add copying token value and add Boehm GC ready for runtime implimentation

src/memory.h

@@ -0,0 +1,19 @@
+#ifndef ARGON_MEMORY_H
+#define ARGON_MEMORY_H
+
+#include <stddef.h> // for size_t
+
+// GC-managed allocations
+void* ar_alloc(size_t size);
+void* ar_alloc_atomic(size_t size);
+char* ar_strdup(const char* str);
+
+// Optional: temporary/arena allocations (e.g., for parsing)
+void* ar_temp_alloc(size_t size);
+void ar_temp_free_all();
+
+// Memory init/shutdown
+void ar_memory_init();
+void ar_memory_shutdown();
+
+#endif // ARGON_MEMORY_H