feat: implement react-native-quick-bip39 ⚡️

[athexweb3]

This PR introduces react-native-quick-bip39, a high-performance, lightweight, and type-safe implementation of BIP39 that leverages react-native-quick-crypto for cryptographic primitives.

Unlike pure JS implementations (like bip39 or @scure/bip39) which block the JS thread during seed derivation, this package offloads the heavy PBKDF2 calculation to C++ via RNQC, resulting in ~100x faster performance on mobile devices.

Why a separate package?

I deliberately separated react-native-quick-bip39 from the core react-native-quick-crypto library to strictly control bundle size.

• Wordlists are heavy: Including all 10 BIP39 wordlists would add ~300 KB to the bundle.
• Pay-for-what-you-use: Most apps only need the English wordlist (or none at all if just using AES/Hashing).
• Core Focus: react-native-quick-crypto stays a lightweight, low-level primitive library, while this package handles the higher-level BIP39 standard.

Features

• ⚡️ Performance: Mnemonic-to-seed derivation is now lightning fast (~20ms vs ~1500ms on older devices).
• 📦 Bundle Size Optimized:
  • Default size is ~19 KB (only includes English wordlist).
  • Other 9 languages are fully tree-shakeable and only bundled if imported.
• 🌍 Full Multi-Language Support:
  • Includes all 10 standard BIP39 wordlists.
  • Correctly handles Japanese ideographic headers (\u3000 delimiter).
• 📚 Documentation:
  • Added dedicated API Reference page: docs/api/bip39.
  • Updated Crypto Wallet Guide: docs/guides/crypto-wallet.
  • Professional README.md with responsive banners.

Changes

• New Package: packages/react-native-quick-bip39 containing the source, tests, and build scripts.
• Workspace: Added the new package to root package.json workspaces.
• Docs:
  • Created docs/content/docs/api/bip39.mdx.
  • Updated docs/content/docs/guides/crypto-wallet.mdx to recommend this new package.
  • Added bip39 to docs/content/docs/api/meta.json.
• Chore: Updated root .gitignore to properly ignore docs/.next, docs/.source, and docs/next-env.d.ts build artifacts.

Benchmarks

Operation	Time (Pure JS)	Time (RNQC/RNQB)
Mnemonic to Seed	~1500ms	~20ms

Bundle Size

Configuration	Size (Minified)
Default (English)	18.9 KB
All Languages	~283 KB

Verification

• Tested generateMnemonic (12 & 24 words).
• Tested mnemonicToSeed (Async & Sync).
• Verified Japanese delimiter handling.
• Verified tree-shaking works (only imported wordlists are bundled).
• bun test passes for all test suites.

[athexweb3]

Needs to be added inside RNQC example app test

[boorad]

@athexweb3 What do you think about this lib getting its own repo, but importing and heavily using react-native-quick-crypto?

[athexweb3]

That's a fair point, @boorad. However, I think keeping it as a workspace in this monorepo is more beneficial for now.

Unless you want to keep this repo strictly for RNQC only, I’d vote for keeping it here. What is your opinion?

[boorad]

I think separated is better, not because I want this to be only RNQC, but for people looking for the library's repo, and for dedicated fixes/optimizations.

[athexweb3]

oh ok! i will put this in a seperate repo. Thanks