refactor: adopt monorepo structure

This adopts Lerna to assist with building a monorepo. I looked at pnpm
and Yarn workspaces too--while these do some monorepo things, both are
more primitive (and can actually be used by) Lerna, so I just stuck with
that.

As referenced in the issue, with this change the `protocol` gets
symlinked into the other packages locally. I removed the separate
generator package so that the `protocol` produces all the things it
needs without having an extra dependency. Then, when we want to publish,
one can `npm run version -- <version>`, which will run `lerna version`
to update the version of all packages and push their tags. Packages
get published from the Github workflow.

Fixes #260

Author: connor4312

.github/workflows/ci.yml

@@ -0,0 +1,30 @@
+name: CI
+on: push
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-node@v2
+        with:
+          node-version: ^16
+      - run: npm ci
+      - run: npm run compile
+      - run: npm test
+
+  publish:
+    runs-on: ubuntu-latest
+    needs: build
+    if: startsWith(github.ref, 'refs/tags/v')
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-node@v2
+        with:
+          node-version: ^16
+      - run: npm ci
+      - run: npm run compile
+      - run: npm test
+      - run: npx [email protected] publish from-git
+        env:
+          NODE_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}

.gitignore

@@ -29,4 +29,5 @@ node_modules
 npm-debug.log
 
 test.json
-debugProtocol2.d.ts
+debugProtocol2.d.ts
+*.tgz