feat(wallet): add back TxBuilder finish() and sort_tx() with thread_rng()

crates/wallet/Cargo.toml

@@ -25,7 +25,7 @@ bip39 = { version = "2.0", optional = true }
 
 [features]
 default = ["std"]
-std = ["bitcoin/std", "miniscript/std", "bdk_chain/std"]
+std = ["bitcoin/std", "bitcoin/rand-std", "miniscript/std", "bdk_chain/std"]
 compiler = ["miniscript/compiler"]
 all-keys = ["keys-bip39"]
 keys-bip39 = ["bip39"]