feat: makefile adjust for windows

Makefile

@@ -0,0 +1,47 @@
+# Project metadata
+APP_NAME := hspguard
+CMD_DIR := ./cmd/$(APP_NAME)
+BIN_DIR := ./bin
+
+# Detect platform and add .exe suffix on Windows
+OS := $(shell go env GOOS)
+EXT := $(if $(filter windows,$(OS)),.exe,)
+BIN_PATH := $(BIN_DIR)/$(APP_NAME)$(EXT)
+
+PKG := ./...
+
+# Go tools
+GO := go
+GOLINT := golangci-lint
+GOFMT := gofmt
+GOTEST := go test
+
+# Build flags
+LD_FLAGS := -s -w
+BUILD_TIME := $(shell date -u '+%Y-%m-%dT%H:%M:%SZ')
+GIT_COMMIT := $(shell git rev-parse --short HEAD 2>NUL || echo unknown)
+
+.PHONY: all build clean fmt lint run test mod
+
+all: build
+
+build:
+	$(GO) build -ldflags "-X main.buildTime=$(BUILD_TIME) -X main.commitHash=$(GIT_COMMIT) $(LD_FLAGS)" -o $(BIN_PATH) $(CMD_DIR)
+
+run:
+	$(GO) run $(CMD_DIR)
+
+fmt:
+	$(GOFMT) -s -w .
+
+lint:
+	$(GOLINT) run
+
+test:
+	$(GOTEST) -v $(PKG)
+
+clean:
+	@if [ -d "$(BIN_DIR)" ]; then rm -rf $(BIN_DIR); fi
+
+mod:
+	$(GO) mod tidy