Also upgrade dependencies and remove unused ones. Upgrade Node.js
version to 20. Also update commands in package.json, and ESLint and
prettier configurations.

All unittests in v1 are removed.

Removed VSCode devcontainer as it is no longer needed.

Removed unittests in CI/CD as they are not yet implemented.

The settings API is returning checking list with length 8. Not sure why
but this violates with our spec.

We want that all logging messages be printed to stderr, and command
results stdout, but `loglevel` outputs messages of `info` level to
stdout, and there is no way to configure. Therefore implement our own
logging functions. Also use `chalk` for printing colors.

Also remove dependency from API to logging utility.

Avoid depend on dom lib.

Use @commander-js/extra-typings for smarter type infer.

Split error handling functions and cookie and verbosity utilities from
cli/index.ts.

Merge unittests.yml into publish.yml Only run building and tagging when
pushing to main or dev branch, or when the workflow is triggered
manually.

Do not force pushing general version tag (vX.X.X). This help avoid to
accidentally overriding existing tags.

Add a fake test script. This is because unittests are required when
running CI/CD.