Would a py_interactive rule be useful to include?

# 🚀 feature request

This is a request to get thoughts on contributing https://github.com/jpwoodbu/rules_python_interactive to `rules_python`.

### Relevant Rules

Perhaps `py_binary` and `py_library`?

### Description

I have made https://github.com/jpwoodbu/rules_python_interactive, which adds a `py_interactive` macro, and I wonder if it's worth including within `rules_python` itself. I see there's a relatively new [REPL](https://github.com/bazel-contrib/rules_python/blob/main/docs/repl.md) feature that does nearly the same thing. But there are some important ergonomic differences.

1) `py_interactive` targets are set up within `BUILD.bazel` files just like a `py_binary`.
1) `py_interactive` shells have tab completion.
1) `py_interactive` has an optional `pushes` argument for initial setup (e.g. importing a module).

Having the setup within the `BUILD.bazel` file is really the key difference. If you often need to debug inside an interactive shell, it's nice to have the configuration in place and just a simple `bazel run :my_library_interactive` away. The setup is also very easy to understand. In most cases, it's identical to setting up a `py_binary`.

### Describe the solution you'd like

My preferred solution would be to add `py_interactive` from https://github.com/jpwoodbu/rules_python_interactive to `rules_python`, should it makes sense to do so. This is not a proposal to remove the REPL feature. It could be worth having both: one that requires setup but is easier to use and one that only requires the right command line.

### Describe alternatives you've considered

I had considered having a virtual rule for `py_library` where you could run a `py_library` target, perhaps with a `.i` suffix to get an interactive shell. But I suspect there would be many efficiency downsides for Bazel itself. And it lacks the configurability of a whole new rule/macro (e.g. adding a specific collection of `deps` unlike any existing `py_library` targets).

Lies docs/repl.md und vergleiche es mit dem referenzierten rules_python_interactive-Projekt sowie den bestehenden py_binary- und py_library-Einstiegspunkten. Als abgeschlossen gilt, wenn eine Maintainer-Entscheidung darüber erreicht wurde, ob py_interactive zu rules_python gehört und wie es neben der REPL bestehen würde; dieses Issue definiert kein Implementierungs- oder Testziel.

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