feat(wallet): add functions to lock and unlock utxos #1369

Job	Run time
Build and test (stable, true, --no-default-features --features miniscript/no-std)	1m 52s
Build and test (stable, true, --all-features)	3m 48s
Build and test (1.63.0, --no-default-features --features miniscript/no-std)	2m 58s
Build and test (1.63.0, --all-features)	5m 13s
prepare	2s
Build & Test Examples (example_cli)	30s
Build & Test Examples (example_bitcoind_rpc_polling)	39s
Build & Test Examples (example_electrum)	52s
Check no_std	35s
Build & Test Examples (example_esplora)	56s
Build & Test Examples (example_wallet_electrum)	52s
Check WASM	57s
Rust fmt	12s
Build & Test Examples (example_wallet_esplora_async)	1m 0s
Build & Test Examples (example_wallet_esplora_blocking)	57s
Build & Test Examples (example_wallet_rpc)	41s
clippy_check	46s
	22m 50s

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