feat(start): initialize project with Go scaffold

- Add basic Go application structure.- Include `.gitignore` file with common Go ignores.
- Create `main.go` with initial "Hello, World!" implementation.

main.go

@@ -13,5 +13,5 @@ var rootCmd = &cobra.Command{
 }
 
 func main() {
-	fmt.Println("Hello, World!")
+	rootCmd.Execute()
 }