This PR moves the puppeteer source code into separate mono-repo packages:
- `puppeteer` and `puppeteer-core` are now separated into their own
packages.
- `puppeteer-core` has a new exports called `puppeteer-core/internal`
for internal usage.
Tests and various tools have been updated to accommodate the migration.
This PR adds an official Dockerfile for Puppeteer. The content of the Dockerfile is practically the same as documented in troubleshooting.md:
1) It installs chrome-stable and dependencies via apt-get.
2) it installs a local Puppeteer build into the docker user's home folder.
3) configures required permissions for the user.
4) outputs licenses into the THIRD_PARTY_NOTICES file.
The local Puppeteer build is created by `docker/pack.sh` which is meant to be used in CI. This PR also includes a GitHub action that would build a docker image and run a smote test inside of it.
The next step would be actually publishing the docker image from GitHub Actions to GitHub Registry.
