Add MIT license and update package metadata

[devmaxxx]

Summary

• Add the MIT LICENSE file; npm ships it with the package.
• Set the package author to Maksym Synenko instead of the old arenuzzz handle; the README license line links the file.
• Add homepage (live demo), bugs, a full repository URL, a clearer description and Next.js/Vite/webpack keywords. Lands before the 1.0.0 npm publish so the npm page shows them.

Test plan

• pnpm lint and pnpm build pass
• No arenuzzz reference left (git grep)