add 9p implementation

[driusan]

It would be nice to have a 9p implementation for github issues, which would automatically mount the issues from github of the current git repo using the github api. Then you'd be able to use the bug tool from the command line in a non-distributed manner (at least on Plan 9) to manage public issues.

There would probably need to be some safety net to make sure switching branches that have a issues directory doesn't create github issues

[kajmagnus]

Can I ask what is Plan 9? Is it this distributed file system: https://9p.io/plan9 ?

[driusan]

Plan 9 is an operating system that was designed at Bell Labs as the successor to UNIX. The mainline version of it isn't really maintained anymore, but some forks of it are still active. It takes the "everything is a file" philosophy to the extreme. (9p.io is a mirror of what used to be plan9.bell-labs.com)

For the purposes of this ticket, 9p is a protocol used by Plan 9 (and its variants) that you can think of as having a similar use case to fuse on Linux, but is simpler.