feat: scaffold C++ template with tooling helpers

Makefile

@@ -0,0 +1,29 @@
+CXX := g++
+CXXFLAGS := -std=c++20 -Wall -Wextra -Wpedantic -O2
+LDFLAGS :=
+SRC_DIR := src
+BUILD_DIR := build
+TARGET := app
+
+SRCS := $(wildcard $(SRC_DIR)/*.cpp)
+OBJS := $(patsubst $(SRC_DIR)/%.cpp,$(BUILD_DIR)/%.o,$(SRCS))
+
+$(TARGET): $(OBJS)
+	$(CXX) $(OBJS) $(LDFLAGS) -o $@
+
+$(BUILD_DIR)/%.o: $(SRC_DIR)/%.cpp | $(BUILD_DIR)
+	$(CXX) $(CXXFLAGS) -c $< -o $@
+
+$(BUILD_DIR):
+	mkdir -p $(BUILD_DIR)
+
+.PHONY: clean run format
+
+run: $(TARGET)
+	./$(TARGET)
+
+clean:
+	rm -rf $(BUILD_DIR) $(TARGET)
+
+format:
+	clang-format -i $(SRCS)