Add `contract alias ls`. #1027

Job	Run time
build (stellar-cli, stellar, ubuntu-20.04, x86_64-unknown-linux-gnu)	15m 7s
build (stellar-cli, stellar, ubuntu-20.04, aarch64-unknown-linux-gnu)	16m 4s
build (stellar-cli, stellar, macos-14, x86_64-apple-darwin)	8m 55s
build (stellar-cli, stellar, macos-12, aarch64-apple-darwin)	18m 58s
build (stellar-cli, stellar, windows-latest, x86_64-pc-windows-msvc, .exe)	20m 38s
build (soroban-cli, soroban, ubuntu-20.04, x86_64-unknown-linux-gnu)	15m 2s
build (soroban-cli, soroban, ubuntu-20.04, aarch64-unknown-linux-gnu)	15m 49s
build (soroban-cli, soroban, macos-14, x86_64-apple-darwin)	11m 10s
build (soroban-cli, soroban, macos-12, aarch64-apple-darwin)	20m 47s
build (soroban-cli, soroban, windows-latest, x86_64-pc-windows-msvc, .exe)	20m 36s
	2h 43m 6s

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