libyang REFACTOR separate macros to edit sized arrays and linked list

Keep the macros in a standalone header to allow making this header
public for plugins API in future without affecting the rest of internal
data in common.h
diff --git a/src/plugins_exts.h b/src/plugins_exts.h
index bad8eb2..9ae1e05 100644
--- a/src/plugins_exts.h
+++ b/src/plugins_exts.h
@@ -16,6 +16,7 @@
 #define LY_PLUGINS_EXTS_H_
 
 #include "log.h"
+#include "tree_edit.h"
 #include "tree_schema.h"
 
 struct ly_ctx;