Commits on Dec 6, 2022

1. feat(typescript-estree): add experimental mode for type-aware linting… …

   … that uses a language service instead of a builder program
   
   ## PR Checklist
   
   - [x] Steps in [CONTRIBUTING.md](https://github.com/typescript-eslint/typescript-eslint/blob/main/CONTRIBUTING.md) were taken
   
   ## Overview
   
   This is just an experiment to help address memory issues (#1192), maybe performance, and maybe out-of-sync types (#5845).
   
   I was looking into some code around the place and noticed that TS exposes the concept of a "document registry" - which is a shared cache that can be reused across certain TS data structures to deduplicate memory usage (and I assume improve performance by deduplicating work).
   
   This PR implements a new parser strategy which uses TS's "Language Service" tooling, which in turn leverages the document registry. "persistent parse" tests pass - which at least proves that it works in some manner of speaking.
   
   One interesting thing to note here is under the hood the language serivce doesn't use a builder program. I believe the idea is that the document registry is supposed to forego the performance implications of that? I don't know exactly - it will require more testing. Though it's worth mentioning that this means this could replace our current "single-run" codepaths because it doesn't use a builder program.
   
   TODO:
   - figure out how to roll-back "dirty" states
   - memory pressure testing
   - runtime performance testing

   bjz@Brads-MacBook-Pro.local committed Dec 6, 2022
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