[Feature Request] Filter based on context

[Mossop]

You can currently filter based on global, session, host or directory. I think it would be interesting to also be able to filter on some kind of detected context. For example in the directory of any rust project I am likely to be using cargo a lot but I am unlikely to use it elsewhere. I could use directory filtering, but really it is a lot of directories across different hosts that I would like to have shared context.

Likewise when I am working on Firefox development there are a set of commands that I use all the time there but never anywhere else. I could use directory filtering, but the directories differ between different hosts and again I would like to share across all hosts.

I think the most straightforward way to do this would be by using an environment variable to define the context. So ATUIN_CONTEXT=firefox would select the Firefox context and any commands would have that state stored and when filtering it would default to only show those commands. I could then use direnv or equivalent to set that context whenever I'm in the appropriate directory.