I started doing this by hand on my plugin types branch!

https://github.com/typescript-eslint/typescript-eslint/pull/120/files/e44fba51ff881b642a3a96232488c3380ffabf2b..9bfbb86125c1d7c4ebe200ef1adec6462f0673e8

I was going through each case 1-by-1 and mapping the types together, and mirroring the same names for reusable type groupings that Typescript uses:

It's probably better to use these generated types and do a manual pass over convert.ts to make sure things match up

during generation i'm able to group nodes (i have functionality for this)

That's awesome! But we'd have to go through the typescript AST to find out all of the reusable type groupings they use, then map those types in ESTree nodes. It's simple to do, but it's far from a trivial thing time-wise, so it's probably better left till after.

Anyways, we'd probably want to do a manual pass over these types to triple check they aren't missing anything from our conversion logic in convert.ts.

this is first step, i have in plans to use types in converter itself

this PR is to your branch not to master

I didn't notice that. Awesome, feel free to merge it in.
I'll reconcile the two lists, delete mine and keep plugging through the logic.
I'm about 1/3 of the way through.