Add initial support for reading an asset pack

include/pak.h

@@ -4,6 +4,11 @@
 #include "aliases.h"
 #include <stdbool.h>
 
+typedef struct {
+  u64 size;
+  u8 *data;
+} buf_t;
+
 typedef struct {
   u64 offset;
   u64 length;
@@ -32,6 +37,11 @@ typedef struct {
   toc_t toc;
 } pak_t;
 
+typedef struct pak_read pak_read_t;
+
 bool create_asset_pack(const char *dirpath, const char *output);
+pak_read_t *load_asset_pack(const char *filepath);
+// buf_t read_file_from_pack(pak_read_t *pack, const char *filename);
+void close_asset_pack(pak_read_t **pack);
 
 #endif // !PAK_H