wallet-core: Integrate aeternity blockchain

Name: aeternity

HD Derivation Scheme: 457

Symbol: AE

Documentation: https://aeternity.com/ https://github.com/aeternity

Reason:

Checklist

• Implement functionality in C++. Put it in a subfolder of src/.
  • Address (if necessary)
  • Transaction (if necessary)
  • Signer
• Write unit tests. Put them in a subfolder of tests/. [ ] Mnemonic phrase - > Address derivation test. Put this test in the CoinTests.cpp file
• Add relevant constants in TWCoinType, TWP2SHPrefix, TWEthereymChainID, TWHRP, etc., as necessary.
• Return correct curve and purpose in src/Coin.cpp.
• Implement address validation and derivation in src/Coin.cpp.
• Implement coin configuration src/include/TWCoinTypeConfiguration.cpp.
• Write interface header in include/TrustWalletCore and implement the interface in src/interface.
  • Address interface (if necessary).
  • Signing interface.
• Validate generated code in Android an iOS projects. Write integration tests for each.
• Add a coin icon to “Supported Blockchains” section in README.md
  • Upload coin icon to TrustWallet/tokens if necessary