Lazy Simple HTTP Framework

NewResponseWriterWrapper initializes a new ResponseWriterWrapper.

1) Defer buffer allocation in rwriter.go.

2) Check logger != nil in ctx.go (guard logging statements).

3) Add simple security headers in router.go.

APIError represents an API error with a message and HTTP status code.

BaseResult is the standard response format.

Group represents a group of routes with a common prefix and middleware.

ResponseWriterWrapper wraps http.ResponseWriter and captures response data.