Task 071: README更新

Status: DONE

Motivation

Human directive: 「READMEなども適宜更新してほしい」

Completed

• Rewrote README.md with:

- Project overview with GitHub Pages link

- Route summary and analysis description

- Project structure tree

- Technology stack table (Rust, WASM, TypeScript, Playwright, CI)

- Local development instructions

- Agent loop setup (consolidated)

- License/data note