Guide to go-opera: Better error handling in Go, but less boilerplate

Error handling in Go has been debated for years. Many developers appreciate the explicit and imperative style of if err != nil, and there is real value in that clarity. But that same style also limits how expressive code can be. As the control flow becomes more complex, the amount of boilerplate grows quickly, and the actual business logic gets buried under repetitive error checks. This is exactly the problem I wanted to improve with go-opera: keep Go's explicitness, but reduce the friction. I