Optimize package size by using .d.ts and js for large ts files such as material icons file

[softmarshmallow]

5000+ Lines

https://github.com/gridaco/flutter-builder/blob/main/packages/flutter/lib/material/icons.ts

This almost takes up 666kb as js on npm. we can minimize this by exporting all types to .d.ts and having single dynamic function on js side.