Extended packing and extracting library for value types (#5056)

Co-authored-by: ernestognw <ernestognw@gmail.com>

scripts/generate/templates/Packing.opts.js

@@ -0,0 +1,5 @@
+const { range } = require('../../helpers');
+
+const SIZES = range(1, 33).filter(size => size == 1 || size == 2 || size % 4 == 0);
+
+module.exports = { SIZES };