The goal here is to remove ICU data from the CanvasKit wasm bundle (~500kb gzipped).

Right now, SkParagraph depends on ICU data to do things like line breaks, bidi regions, grapheme and word boundaries. Instead, we propose that the flutter web engine supply all the necessary bits such that ICU isn't needed anymore.

To get there, we will be using the following:

1. Intl.Segmenter for grapheme and word boundaries.
2. v8BreakIterator for line breaks on Chrome (and our own implementation for other browsers).
3. Our own implementation for Bidi regions.