Missing Project Config Produces Unhelpful Error

[grainme]

Description

Running 95 test without a local config.json results in a low-level file error that does not guide the user on how to fix it.

Steps to Reproduce

1. Ensure no config.json exists.
2. Run:

   95 test ccff9525-ec1a-4afb-8347-731a2f2ffdab

Current Behavior

Error: failed to load project config: failed to read project config: open config.json: no such file or directory

Expected Behavior

The CLI should explain that the project is not initialized and how to fix it.

Suggested Improvement

If config.json is missing, show a clear message such as:

No project configuration found.
Run `95 init --cmd <command>` to generate one.