chore: add Makefile

Makefile

@@ -0,0 +1,32 @@
+GRADLEW := ./gradlew
+
+GRADLE_FLAGS ?=
+
+.PHONY: help \
+	clean build test check jacoco
+
+help:
+	@echo "Targets:"
+	@echo "  make build         Build all modules (assemble)"
+	@echo "  make test          Run unit tests"
+	@echo "  make check         Run verification (check)"
+	@echo "  make jacoco        Generate aggregate JaCoCo report"
+	@echo "  make clean         Clean build outputs"
+	@echo ""
+	@echo "Variables:"
+	@echo "  GRADLE_FLAGS       Extra flags passed to Gradle (e.g., --no-daemon --stacktrace)"
+
+clean:
+	$(GRADLEW) $(GRADLE_FLAGS) clean
+
+build:
+	$(GRADLEW) $(GRADLE_FLAGS) assemble
+
+test:
+	$(GRADLEW) $(GRADLE_FLAGS) test
+
+check:
+	$(GRADLEW) $(GRADLE_FLAGS) check
+
+jacoco:
+	$(GRADLEW) $(GRADLE_FLAGS) jacocoTestReport