v1.0.1 — Documentation & SEO polish

Release v1.0.1: added pkg.go.dev badges, documentation links, and improved README SEO.

v1.0.0 — Official CaptchaAI Go SDK

Official Go 1.22+ SDK (go get github.com/CaptchaAI/captchaai-go) with zero external dependencies, context cancellation, and functional options for all CaptchaAI challenge types.