bug: stopping a city inside a rig folder gives: "no such file or directory"

[csells]

Before you continue

• I searched existing issues and did not find a duplicate.
• I read the relevant docs and contributor guidance.

Gas City version

main@1fa5ec18

Environment

macos

Reproduction

~/my-project
$ gc stop

I suspect gc start does the same.

Expected behavior

Unregistered city 'my-city' (/Users/csells/my-city)
Reconciliation triggered.
City stopped.

Actual behavior

gc stop: loading config "/Users/csells/my-project/city.toml": open /Users/csells/my-project/city.toml: no such file or directory

Logs, screenshots, or traces

Additional context

No response