Potential deprecation of concolor

[epage]

I'm posting this as this project is reported as a dependent of concolor and wanted to both give you a heads up to prepare and an opportunity to discuss in case we should re-evaluate this.

We are proposing deprecating concolor in favor of either

• anstream
• application-specific solutions built on colorchoice, colorchoice-clap, and your choice of environment detection crates including anstyle-query and supports-color.

We welcome feedback on this topic at rust-cli/concolor#47

[Zheoni]

I will wait to see what ariadne does (zesterer/ariadne#81).

I like the anstream + colorchoice-clap approach.

[Zheoni]

Concolor dependency removed