Extending with `sandbox` capabilities

[ToolKami]

Hi @tobi ,

First of all, thanks for the amazing work! It is a wonderfully simple tool that made a great difference in my life.

I've copied try's implementation and modified it to have sandbox capabilities so that I can use it to run coding agents in parallel.

The new commands are:

• toolkami worktree: Create worktree from current repo and copies config to .toolkami sub-directory.
• toolkami sandbox: Run Docker sandbox from .toolkami/docker-compose.yml
• toolkami merge: Merge worktree changes back to parent repo
• toolkami drop: Delete worktree and branch

Here is a visual architecture diagram:

Here is the implementation: https://github.com/aperoc/toolkami

I understand that this may add unnecessary dependencies and may not be a design that fits your philosophy, but if there is any remote interest, I would be keen to discuss and do a PR to incorporate these features!

Would be keen to know if you're trying to run multiple agents at once and what your workflow looks like?