The former bc `claude` needs it for its new "offline" REPL simulator
script `snippets/claude_debug_helper.py` and pin to `xonsh` git mainline
to get the fancy new next cmd/suggestion prompt feats (which @goodboy is
using from `modden` already). Bump lock file to match.
Ah right, and for now while hackin pin to a local `tractor` Bp
Such that we start encouraging devs to lint code they touch and
hopefully we include a pass as part of our tests/CI eventually B)
Also, mk local `tractor` install `--editable` since without it being
a locally hackable repo it's kinda pointless to install from the local
fs Xp