feat: add LSP config, validation tests, and contract test files #22

Job	Run time
integration-tests (message_passing)	2s
integration-tests (comprehensive)	3s
integration-tests (atomic_swap)	3s
integration-tests (failure_scenarios)	2s
integration-tests (multichain)	2s
integration-tests (smoke)	2s
integration-tests (bridge)	2s
nightly-integration-tests	0s
integration-test-coverage	0s
	16s

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