feat(wasm-utxo): add dash module with transaction wrapper

Add Dash support to WASM package by creating a new module and exposing
the Dash transaction wrapper for JavaScript interoperability.

Issue: BTC-2659

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

Author: OttoAllmendinger

packages/wasm-utxo/src/lib.rs

@@ -1,4 +1,5 @@
 mod address;
+pub mod dash;
 mod error;
 pub mod fixed_script_wallet;
 mod networks;

packages/wasm-utxo/src/wasm/mod.rs

@@ -1,5 +1,6 @@
 mod address;
 mod bip32;
+mod dash_transaction;
 mod descriptor;
 mod ecpair;
 mod fixed_script_wallet;
@@ -15,6 +16,7 @@ mod wallet_keys;
 
 pub use address::AddressNamespace;
 pub use bip32::WasmBIP32;
+pub use dash_transaction::WasmDashTransaction;
 pub use descriptor::WrapDescriptor;
 pub use ecpair::WasmECPair;
 pub use fixed_script_wallet::FixedScriptWalletNamespace;