Add warning to Python version about the new Rust version

[zcutlip]

Problem

I've been running the Python pls for a long time; it's intallation is automated across all of my systems. I was reading the documentation today and discovered some features didn't work on my installed version. This led to quite a bit of confusion when I realized this pls is written in rust. I thought perhaps the Python version was a separate project from a different developer. It was only after searching GitHub issues and discussions that I discovered the rewrite a couple years ago.

Description

Some sort of warning/announcement mesage in the Python version directing the user to check out the new rust version might have cleared things up. This could possibly be in the --help or --version output if you didn't want it to be displayed during normal use.

Alternatives

Maybe a note in the current documentation for users who arrive there confused?

Thanks again for pls!

[dhruvkb]

Sorry that it caused so much confusion. The Python version was not very good in terms of performance and the effects started to get more pronounced with the addition of more and more specs (and thus m × n regex comparisons) so I rewrote it in Rust.

I didn't warn or send a message to Python users because it wasn't broken in any way and folks could just continue to use it if they wanted. Also it didn't really have a lot of users from Python-times so most of the people were using the Rust version anyway. In that sense, thanks for being a long-time user!

Happy to merge PRs that clarify this rewrite in the docs.

[zcutlip]

Sorry that it caused so much confusion.

easily 50% me overthinking things ;-)