feat(chain): add topological ordering for canonical transactions #285

Job	Run time
Rust fmt	17s
prepare	5s
Check no_std	42s
Rust clippy	1m 21s
Check WASM	3m 16s
Build & Test (1.88.0, true, --no-default-features --features miniscript/no-std,bdk_chain/hashbrown)	1m 58s
Build & Test (1.88.0, true, --all-features)	3m 45s
Build & Test (1.75.0, --no-default-features --features miniscript/no-std,bdk_chain/hashbrown)	2m 23s
Build & Test (1.63.0, --no-default-features --features miniscript/no-std,bdk_chain/hashbrown)	8m 6s
Build & Test (1.63.0, --all-features)	9m 9s
Build & Test (1.75.0, --all-features)	4m 4s
Build & Test Examples (example_bitcoind_rpc_polling)	55s
Build & Test Examples (example_electrum)	1m 3s
Build & Test Examples (example_esplora)	57s
Build & Test Examples (example_cli)	41s
	38m 42s

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