Revamp README and clarify iOS color docs

Rewrite README with a full docs overhaul: updated badges, quick-start, installation (yarn/npm/pnpm/bun), requirements (New Architecture / no Expo Go), API and options tables, migration notes from react-native-inappbrowser-reborn, FAQ, platform notes, examples, contributing instructions, and CI/dev workflow. Also adjust examples to use the hook import path and demonstrate open/openAuth usage. Add clarifying JSDoc to InAppBrowser iOS options in src/types.ts describing iOS 26 "Liquid Glass" behavior for preferredBarTintColor and preferredControlTintColor and noting backward compatibility.

Author: mCodex