Provide metadata about TypeScript's available refactorings and quick fixes

Problem

We are working on improving discoverability of JS/TS refactorings and quick fixes in VS Code. As part of this, we'd like to put together documentation and a new contribution points that lists out the code actions provided by TypeScript

At the moment, the only way I know to determine this list is to look through the TypeScript codebase.

Proposal

We'd like a way to get metadata about all the current TS quick fixes and code actions. The main information we are interested in:

• Identifier for the quick fix
• Human readable name / description for the quick fix
• (possibly) A way to map this description to the localized description that TS ships with

Two ideas on how this could be exposed:

• In the TS repo, check in a generated CodeActions.json file. This file would be updated whenever the refactorings or quick fixes change. VS Code would not need this to be published as part of the TypeScript package

• Expose a command line option or tool to dump out all known refactorings and quick fixes.

/cc @orta Ryan mentioned you may also find this useful for the website