Better automate API docs generation process

It's quite tedious to generate new API docs.

The main limitation we've faced in the past is not having a Box API to automate uploading the zip file. We should revalidate if there is still not an API.

Even if there is not an API we can use for Box, we could automate all of the other steps documented in the README, such as downloading the file from GitHub Releases. We could have the script pause at the point that where the user needs to manually intervene.

There needs to be some thought into the API design for npm run gen-api. It is very helpful to keep having the script behave how it currently is, i.e. not mess around with GH actions or write Git commits by default. The current surface area makes it less risky to run the script because it has fewer side-effects, and it allows it to be composed nicely with things like the regen-apis script. Instead, we should either add a new script or add new CLI args, such as: npm run gen-api -- -p qiskit -v 2.4.0 --update-box --save-historical --bump-dev