chore: Check in mocks and ensure they're up to date in presubmit checks (#109)

Author: ellistarn

Makefile

@@ -55,6 +55,11 @@ vet: ## Vet the code and dependencies
 	go generate ./...
 	go vet ./...
 	go fmt ./...
+	@git diff --quiet ||\
+		{ echo "New file modification detected in the Git working tree. Please check in before commit."; git --no-pager diff --name-only | uniq | awk '{print "  - " $$0}'; \
+		if [ "${CI}" = true ]; then\
+			exit 1;\
+		fi;}
 
 .PHONY: test
 test: ## Run tests.