Add a clang format file #185

Job	Run time
Build application (nanos)	1m 11s
Build application (nanosp)	3m 8s
Build application (nanox)	1m 18s
Build application (stax)	3m 11s
build_docker_integration_tests / Build docker image	18s
build_docker_tezos_ocaml / Build docker image	26s
generate_samples_unit_tests	7m 40s
integration_tests_basic (nanos)	1m 35s
integration_tests_basic (nanosp)	1m 43s
integration_tests_basic (nanox)	1m 32s
integration_tests_basic (stax)	1m 16s
integration_tests_samples (nanos, micheline)	16m 21s
integration_tests_samples (nanos, operations)	27m 4s
integration_tests_samples (nanosp, micheline)	18m 5s
integration_tests_samples (nanosp, operations)	35m 6s
integration_tests_samples (nanox, micheline)	15m 20s
integration_tests_samples (nanox, operations)	25m 11s
	2h 40m 25s

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