Rewrite Binding to Commands documentation

[MikeCodesDotNET]

The problem doc is Binding to Commands.

As per this question, we default to ReactiveUI, which while very powerful, is incredibly complex for beginners. It might be useful to rewrite this using Community Toolkit?

In fact, as a larger scope of work, I'd like to see all RxUI references removed from the basic docs and standardise on the community toolkit.

[stevemonaco]

These are the 0.10.x docs. Maybe there's a need for a separate colored indicator / warning for 0.10.x doc pages besides the version indicator that blends in.

The v11 docs are a bit different with ReactiveUI and method binding docs.

Maybe merge these two docs into a single doc and use Tabs to show code for each approach: Mvvm Toolkit, ReactiveUI (if kept), and methods.

[MikeCodesDotNET]

Great catch! I didn't even notice! 🙈

I think @kekekeks has discussed potentially removing the 0.10 documentation, as most of our users (>95%) are building with 11.x.