Build as proper NPM module

[rexgarland]

Impact

• Exposes the module as a proper npm typescript module
• Possibly fixes https://github.com/buildwithflux/flux-app/pull/11695

Description

• Builds ts code according to this guide, and updates package.json accordingly to point to the right file for js distribution

Testing

• local test in test/

TODO:

• update the package.json references in flux-app to reference this code, then check if pnpm build:copilot works on in flux
• Make sure the prettier formats are stable: check on someone else's machine (@gregdingle?)

Notes

• This won't break anything in flux-app, since we're referencing this module by exact commits already, not pointing to HEAD here.

[dominics]

Rebased on latest master, added tsx for running tests and watching files, removed compiled output from source and test directories

At the moment, when using a package that imports this one with webpack, this package needs to be excluded from any ts-loader or babel-loader rules, otherwise you'd receive errors like this:

I believe this PR will fix such errors. The one caveat is that if you need to import this package from Github, you'll need to point at a commit or release that has the dist/ directory included. Therefore, to prepare a release for such uses:

# Check out the commit you want to release, then:
git checkout -B release-prep  # Create a branch, could be anything, just to make sure we don't commit this to master
yarn build                    # Prepare dist/

git add -f dist/              # Add dist/ to git, despite .gitignore
git commit -m "Preparing release"

git tag 2.0.0-rc.1            # Push a release tag
git push origin tag 2.0.0-rc.1

You can then use this release in package.json:

{
  "dependencies": {
    "kicad-to-json": "buildwithflux/kicad-module-parser#2.0.0-rc.1"
  }
}

The current state of this branch is deployed to the above tag/release, so we can test it. (Better would be to do a proper NPM release, but the above works for loading from Github)