Make deploying (bundling) much easier

There are two things that aren't great about deploying at the moment:

1. You can end up having to add a lot packages to dependencesToBundle.

2. You need to match the versions between the SDK and the CLI.

We are changing the way we bundle your code so it works without intervention in more situations. Mainly this means changing to use ESM – we are currently using CJS because of one of our dependencies.

We are also going to change to a single package for the CLI and SDK. This means it will be impossible to have version mismatches between them.