refactor(recipes): update result-refactor recipe for broader package path and error handling

- Change default package_path from internal/service to internal for wider applicability.
- Add instruction to output a specific message if no files are found or path does not exist in Step 1.

.grokkit/recipes/result-refactor.md

@@ -6,7 +6,7 @@ version: 1.0
 parameters:
   package_path:
     type: string
-    default: internal/service
+    default: internal
     description: Package to refactor
   dry_run:
     type: bool
@@ -33,6 +33,7 @@ Refactors all error handling in the target package to use the new Result[T] patt
 ### Step 1: Discover files
 **Objective:** Find every file that needs changing.  
 **Instructions:** Recursively scan `{{.package_path}}` for `.go` files containing `if err != nil`.  
+If no files are found or the path does not exist, output exactly: "No files found matching the criteria." 
 **Expected output:** A clean numbered list of full file paths (one per line).
 
 ### Step 2: Refactor each file