Expose public API with __all__ and minor formatting tweaks

[dbhatman]

This replaces the need for #1016

PiperOrigin-RevId: 478889967

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This change is 

[lalten]

Thanks for taking a stab at this @dbhatman. This does indeed fix the issue with Pylance described in #1016, but it adds another problem: Go-to-definition (in VS Code) will now always jump to __init__.py instead of the actual definition. The solution in #1016 does not show this behavior, it jumps right into the actual source file.

[dbhatman]

Thanks for taking a stab at this @dbhatman. This does indeed fix the issue with Pylance described in #1016, but it adds another problem: Go-to-definition (in VS Code) will now always jump to __init__.py instead of the actual definition. The solution in #1016 does not show this behavior, it jumps right into the actual source file.

Thanks for following up @lalten

The behavior (ie requires the second click of go-to) you are seeing is pretty typical in projects following google style guides because of this style rule: https://google.github.io/styleguide/pyguide.html#22-imports. As part of cleaning up some things on our side so we can more closely align with the style guide, I am going to suggest we go forward with this but I'll keep this issue in mind and see if I can come up with an alternate solution that still complies.

[lalten]

Lgtm then. If you're in the process of cleaning up it would be great to give the pylintrc a refresh as that's currently broken (references deleted plugins and such).

[dbhatman]

Ah was just looking at the pylintrc and scratching my head at the plugins!

(and cleaning that up broke this PR 😆)