Fix parseGoModule function to use strings.SplitSeq and improve efficiency

- Update parseGoModule to use strings.SplitSeq for better performance
- Change GoModule.Module field to GoModule.Name for consistency
- Use strings.CutPrefix instead of HasPrefix + TrimPrefix pattern
- Add early break after parsing go version line
- Update template references to use .GoModule.Name instead of .GoModule

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

assets/.golangci.yml

@@ -6,7 +6,7 @@ linters-settings:
   gofmt:
     simplify: true
   goimports:
-    local-prefixes: {{.GoModule}}
+    local-prefixes: {{.GoModule.Name}}
   govet:
     check-shadowing: true
     enable-all: true