added convenient Makefile for testing

Makefile

@@ -0,0 +1,15 @@
+.PHONY: unit-tests snapshot-tests fuzzer
+
+help:  ## Display this help
+	@awk 'BEGIN {FS = ":.*##"; printf "Usage:\n  make \033[36m<target>\033[0m\n"} /^[a-zA-Z_-]+:.*?##/ { printf "  \033[36m%-15s\033[0m %s\n", $$1, $$2 } /^##@/ { printf "\n\033[1m%s\033[0m\n", substr($$0, 5) } ' $(MAKEFILE_LIST)
+
+unit-tests: ## Run rust unit-tests
+	cargo t --workspace
+
+snapshot-tests: ## Run snaphot-tests located in tests/
+	bash tests/snapshot_tests.sh
+
+fuzzer: ## Launch cargo-afl fuzzer
+	cd fuzzer && \
+	cargo afl build && \
+	cargo afl fuzz -i inputs -o outputs target/debug/fuzz_target