Rename master to main, add makefile for running common commands

Makefile

@@ -0,0 +1,40 @@
+.PHONY: build test fmt lint clean all help
+
+# Default target
+all: fmt lint build test
+
+# Build the binary
+build:
+	@echo "Building git-get..."
+	go build -o git-get ./cmd/
+
+# Run tests with race detection
+test:
+	@echo "Running tests..."
+	go test -race ./...
+
+# Format code
+fmt:
+	@echo "Formatting code..."
+	go fmt ./...
+
+# Run linter with auto-fix
+lint:
+	@echo "Running linter..."
+	golangci-lint run --fix
+
+# Clean built binaries
+clean:
+	@echo "Cleaning..."
+	rm -f git-get
+
+# Show help
+help:
+	@echo "Available targets:"
+	@echo "  build  - Build the git-get binary"
+	@echo "  test   - Run tests with race detection"
+	@echo "  fmt    - Format Go code"
+	@echo "  lint   - Run golangci-lint with auto-fix"
+	@echo "  clean  - Remove built binaries"
+	@echo "  all    - Run fmt, lint, build, and test (default)"
+	@echo "  help   - Show this help message"