add process-compose demo #4360

Job	Run time
Benchmarks (hydra-node, tx-cost, --output-directory $(pwd)/../benchmarks)	2m 21s
Benchmarks (hydra-node, micro, -o $(pwd)/../benchmarks/ledger-bench.html)	1m 29s
Benchmarks (hydra-cluster, bench-e2e, datasets datasets/1-node.json datasets/3-nodes.json --outpu...	4m 43s
Build & test (plutus-cbor)	1m 10s
Benchmarks (plutus-merkle-tree, on-chain-cost, $(pwd)/../benchmarks)	1m 13s
Build & test (plutus-merkle-tree)	1m 3s
Build & test (hydra-plutus)	58s
Build & test (hydra-tui)	2m 1s
Build haddock using nix	1m 8s
Build specification using nix	1m 6s
Build & test (hydra-node)	3m 51s
Build & test (hydra-cluster)	7m 42s
nix flake check	3m 22s
Publish benchmark results	5s
Publish test results	16s
Documentation	1m 25s
	33m 53s

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