add autogeneration of help target for Makefile

Will aggregate targets and comments behind the target, sort them by
target alphabetically and print the output. Removes requirement to
update help target everytime something changes. targets without comment
will not appear in help output.

Makefile

@@ -7,27 +7,25 @@ GO_CLEAN = $(GO_CMD) clean
 BUILD_DIR = build
 BINARY = $(BUILD_DIR)/$(APP_NAME)
 
-.PHONY: build
+.PHONY: all build help clean install
 
 all: build
 
-build:
+build: ## Build the application
 	@echo "Building $(APP_NAME)..."
 	$(GO_BUILD) -o $(BINARY)
 
-install: build
+install: build ## Install the application
 	@echo "Installing $(APP_NAME)..."
 	$(GO_INSTALL)
 
-clean:
+clean: ## Remove build artifacts
 	@echo "Cleaning up build artifacts..."
 	$(GO_CLEAN)
 	rm -f $(BINARY)
 
-help:
+help: ## Print the make targets
 	@echo "Makefile for $(APP_NAME)"
-	@echo "Usage:"
-	@echo "  make build     - Build the application"
-	@echo "  make install   - Install the application"
-	@echo "  make clean     - Remove build artifacts"
-	@echo "  make           - Default target (build)"
+	@echo "Targets:"
+	@grep -E '^[a-zA-Z_-]+:.*?## .*$$' $(MAKEFILE_LIST) | sort | awk 'BEGIN {FS = ":.*?## "}; {printf "\033[36m%-30s\033[0m %s\n", $$1, $$2}'
+