- Add SearchPattern field to Recipe struct
- Update discoverFiles to use configurable search pattern, defaulting to "if err != nil"
- Set default search_pattern in result-refactor.md recipe
Introduce ResolvedParams field to Recipe struct for storing resolved
parameter values from defaults and user overrides. Update loader to
populate and use it for template rendering. Adjust runner to use
ResolvedParams for root path and generalize file discovery.
Introduce ProjectLanguages and Extensions fields to the Recipe struct
to support option 2 for generic file discovery. Also update comments
for internal fields populated by the loader.
