add workflow to build all Rust apps for every PR #110

Job	Run time
Run static analysis for cargo-ledger	1m 39s
Build SDK	1m 43s
Run static analysis (nanos, include_gif)	1m 18s
Build SDK (nanos)	2m 0s
Run static analysis (nanos, testmacro)	1m 23s
Build SDK (nanox)	2m 10s
Check code formatting	1m 20s
Run static analysis (nanos, ledger_secure_sdk_sys)	1m 56s
Build SDK (nanosplus)	2m 4s
Run static analysis (nanos, ledger_device_sdk)	2m 2s
Run unit and integration tests (nanos)	2m 36s
Run unit and integration tests (nanox)	2m 39s
Run static analysis (nanox, include_gif)	1m 30s
Run unit and integration tests (nanosplus)	2m 36s
Run static analysis (nanox, testmacro)	1m 19s
Run static analysis (nanox, ledger_secure_sdk_sys)	1m 58s
Run static analysis (nanox, ledger_device_sdk)	2m 5s
Run static analysis (nanosplus, include_gif)	1m 20s
Run static analysis (nanosplus, testmacro)	1m 18s
Run static analysis (nanosplus, ledger_secure_sdk_sys)	1m 56s
Run static analysis (nanosplus, ledger_device_sdk)	2m 3s
	38m 55s

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