RFC: Size Check Tool

[Aidan Wolter]

Hello all,

I have written an RFC proposing a rewrite of the current in-tree size check tool (size_checker.go) to create a more cohesive in-tree and out-of-tree developer experience.

https://fuchsia-review.googlesource.com/c/fuchsia/+/609963

This was socialized internally, and half of the stakeholders have already given their CR+1.

I would like to find a FEC member to assist in the review.

Thanks!

- Aidan