Mega PR - Adding PoC eth wallet, Snake, Tetris, Pong, other changes.

[shayanb]

Hello.

Here are the updates included in this PR:

Docs and scripts:

• more documentations
• better building and flashing scripts

🎮 Features

Classic Games

• 🐍 Snake: Classic snake game with scoring and right-side orientation
• 🧩 Tetris: Full Tetris implementation with line clearing and level progression
• 🏓 Pong: Player vs AI paddle game with speed boost
• 👾 Le Space: Original Space Invaders clone with explosion effects [known bug: issue with graffics]
• 🎮 Retro Aesthetics: Authentic pixel art and classic game mechanics

Ethereum Wallet (PoC) [NOT TO BE USED IN PRODUCTION]

• Hierarchical Deterministic (HD) Wallet: BIP32-like key derivation with persistent storage
• Full-Screen QR Codes: Large, scannable QR codes with address text overlay [-- currently not scannable]
• Address Generation: Generate new addresses from secure master seed [Needs audit and backup mechanism]
• Persistent Storage: Addresses and keys survive reboots and reflashing
• Hardware Security: Private keys never leave the device

Additional Features

• 🖼️ GIF Viewer: Display animated GIFs [known bug: graphics issues]
• 📋 Scrolling Menu: Circular navigation with separator

---

DEMO

IMG_9759-3.mp4

---

Forum Post : https://forum.firefly.app/t/new-development-lfg-firmware/68

[shayanb]

A comment on this PR: AI was heavily used in the coding of this PR (aka vibe coding). Already seeing a few items in the code changes that were unnecessary. So take it with a grain of salt and for sure review and clean up the code before production use.