Convert file descriptors to generic streams

src/kernel/fat16.h

@@ -1,6 +1,7 @@
 #pragma once
 
 #include "src/kernel/fs.h"
+#include "src/kernel/stream.h"
 
 #define FAT16 1
 
@@ -12,6 +13,8 @@ fs_node_t *fat16_open_at(const fs_node_t *directory, uint64_t index);
 
 fs_node_t *fat16_open_again(const fs_node_t *source);
 
+stream_t *fat16_open_stream(const fs_node_t *source);
+
 void fat16_read(const fs_node_t *file, uint64_t offset, uint64_t size, void *to);
 
 void fat16_close(fs_node_t *node);