Add FixedScriptWallet with methods for creating output scripts and addresses
based on wallet keys. This allows working with standard wallet script types
without needing to create descriptors first.

Issue: BTC-2652

Co-authored-by: llm-git <llm-git@ttll.de>

Add comprehensive Network enum for Bitcoin-like networks with conversion
methods between different naming systems. Implements utility functions
for network identification and conversion between network types, including
mainnet/testnet detection and BitGo coin name mapping.

Co-authored-by: llm-git <llm-git@ttll.de>

Add APIs for encoding/decoding addresses directly with coin names without
requiring a utxolib Network object. This simplifies address handling by
eliminating the dependency on JavaScript Network objects.

New features:
- Add `fromOutputScriptWithCoin` and `toOutputScriptWithCoin` functions
- Support all BitGo UTXO coins through a CoinName type
- Add cashaddr format option for Bitcoin Cash and eCash networks

Issue: BTC-2652

Co-authored-by: llm-git <llm-git@ttll.de>

Update feature matrix to mark FixedScript Wallet address generation
as complete for all altcoins.

Issue: BTC-2652

Co-authored-by: llm-git <llm-git@ttll.de>