build(extension, streams): Add new build:types package script

[SMotaal]

Partially resolves: #72

This PR brings the new build:types package script to @ocap/extension and @ocap/streams which is intended for manual use only to help visualize overall changes to types.

Use

To manually generate types, you can run:

• yarn build:types
• yarn workspace @ocap/extension build:types
• yarn workspace @ocap/streams build:types

To make use of this feature, you can:

• Manually generate the base types.d.ts files
  • Check out the base worktree locally in a separate folder (e.g., main branch)
  • Run yarn and then yarn build:types
• Manually generate the head types.d.ts files
• Use you preferred diff tool to compare the resulting types.d.ts files

Changes

• Adds new build:types package script to:
  • /package.json
  • /packages/extension/package.json
  • /packages/streams/package.json
• Adds ignore rules for package-level types.d.ts files in:
  • /.depcheckrc.yaml
  • /.gitignore
  • /tsconfig.packages.build.json
  • /packages/extension/.eslintrc.cjs
  • /packages/streams/.eslintrc.cjs

Note

This is a draft PR which I plan to promote soon, but please don't hesitate to help move it forward if it helps sooner but only if there are no concerns or blockers.

[rekmarks]

If we want this as a general thing, we should add a constraint that enforces its existence in each package (with exceptions as necessary).

[rekmarks]

I think this would fit neatly on top of #77.