Consider to mark archived (or outdated) projects

[kuolemaaa]

Take for example this chain of plugin managers

• Antigen (last release 2018)
• Antigen-hs (last commit 8 years ago, born to replace oh-my-zsh and antigen, endorses zplug)
• Antibody (archived may 2022, pretty sure born to replace antigen, endorses antidote)
• Antidote (current mantained, supersedes antibody)