Unify all packages into one

[jasagredo]

Description

❯ grep -E "^(library|test-suite|executable|benchmark)" ouroboros-consensus.cabal --color=never | column -t | sort | sed 's/^/\t/'
	benchmark   ChainSync-client-bench
	benchmark   PerasCertDB-bench
	benchmark   mempool-bench
	executable  db-analyser
	executable  db-immutaliser
	executable  db-synthesizer
	executable  db-truncater
	executable  gen-header
	executable  immdb-server
	executable  snapshot-converter
	library     
	library     cardano
	library     diffusion
	library     lmdb
	library     lsm
	library     protocol
	library     unstable-byron-testlib
	library     unstable-byronspec
	library     unstable-cardano-testlib
	library     unstable-cardano-tools
	library     unstable-consensus-testlib
	library     unstable-diffusion-testlib
	library     unstable-mempool-test-utils
	library     unstable-mock-block
	library     unstable-mock-testlib
	library     unstable-protocol-testlib
	library     unstable-shelley-testlib
	library     unstable-tutorials
	test-suite  byron-test
	test-suite  cardano-test
	test-suite  consensus-diffusion-test
	test-suite  consensus-infra-test
	test-suite  consensus-test
	test-suite  diffusion-infra-test
	test-suite  doctest
	test-suite  mock-test
	test-suite  protocol-test
	test-suite  shelley-test
	test-suite  storage-test
	test-suite  tools-test