feat(wallet): add functions to lock and unlock utxos #1366

Job	Run time
Check no_std	25s
Check WASM	1m 6s
Build and test (stable, true, --no-default-features --features miniscript/no-std)	2m 0s
Build & Test Examples (example_cli)	33s
Build and test (stable, true, --all-features)	3m 45s
Build & Test Examples (example_bitcoind_rpc_polling)	43s
Rust fmt	14s
prepare	3s
Build and test (1.63.0, --no-default-features --features miniscript/no-std)	2m 54s
Build & Test Examples (example_electrum)	58s
Build and test (1.63.0, --all-features)	5m 19s
Build & Test Examples (example_esplora)	54s
Build & Test Examples (example_wallet_electrum)	48s
Build & Test Examples (example_wallet_esplora_async)	1m 0s
Build & Test Examples (example_wallet_esplora_blocking)	1m 0s
Build & Test Examples (example_wallet_rpc)	41s
clippy_check	43s
	23m 6s

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