orm: redesign orm (re-write it in V) (#10353)

vlib/mysql/_cdefs_nix.c.v

@@ -1,4 +1,11 @@
 module mysql
 
-#pkgconfig mysqlclient
-#include <mysql.h> # Please install the mysqlclient development headers
+// Need to check if mysqlclient is not there and use mariadb as alternative because newer system doesn't support mysql 8.0 as default
+
+$if $pkgconfig('mysqlclient') {
+	#pkgconfig mysqlclient
+} $else {
+	#pkgconfig mariadb
+}
+
+#include <mysql/mysql.h> # Please install the mysqlclient development headers