feat: expose hideBin helper for CJS

[bcoe]

Exposes the hideBin helper for CJS, so that we can standardize the documentation for ESM, CJS, and Deno.

Updates documentation to suggest this approach by default.

Fixes #1648

TODO: update the rest of the examples in the documentation.

[roryokane]

Here is my feedback on this PR’s documentation changes. I don’t know Yargs internals well enough to comment on the code changes, beyond saying I don’t see anything obviously wrong in the diff.