Migrate to a pnpm monorepo

[pokey]

The problem

All of the Cursorless code exists as part of the VSCode extension and has many references to vscode. We'd like to abstract away VSCode and turn Cursorless into a generic npm package to enable the following:

• Extract cursorless core into a node.js server #435 to support Cursorless in other IDEs
• Allow other applications (eg rango, MS Word plugin) to leverage the Cursorless engine
• Embed Cursorless in Talon for OCR-based global hats
• Support Cursorless VSCode on the web
• Share code with our docs site, which would enable one source of truth between docs and code
• Allow us to fake / mock pieces of VSCode to enable proper unit testing (today nearly all Cursorless tests are end-to-end)

The solution

We'd like to migrate to nx. Let's use pnpm

Experiments to run

• When you do auto-import in VSCode, does it look at node_modules of the package containing the file you're doing auto-import from even if your VSCode workspace is opened to the root directory of the project?
• When you do a rename, will it apply across package boundaries?

To discuss

• What to do about type imports?

Todo

• Enforce pnpm https://www.npmjs.com/package/only-allow
• Setup syncpack to ensure we use consistent versions
• Run typescript scripts directly rather than after compiling? could use https://github.com/esbuild-kit/tsx or https://bun.sh/
• Meta-updater to keep references + other stuff in tsconfig / package.json up to date
  • https://github.com/pnpm/meta-updater
  • https://github.com/pnpm/pnpm/blob/main/.meta-updater/src/index.ts
• Consider wireit (https://github.com/google/wireit) or turborepo for building / caching

old We'll proceed as follows

• Superficial transformation where we convert Cursorless to an nx repo, but keep all of the extension code in a single nx app. Note that the current cursorless-nx directory will become the root of the repo
• Migrate the website directory to a docs nx app. Not sure exactly how to get docusaurus to work as an nx app
• Migrate pieces of the Cursorless core to nx libraries as needed for using them in docs site or Extract cursorless core into a node.js server #435. Note that we'll rely on the abstractions introduced in https://github.com/cursorless-dev/cursorless/tree/main/src/ide to abstract away VSCode
• Run nx migrate to get up to date