Add Makefile with common Go tasks and update CI to use it

Introduce a Makefile to streamline Go-related tasks such as testing, formatting, and installation. Replace the direct `go test` command in the GitHub Actions workflow with `make test` for better maintainability and consistency.

Author: buraksezer

.github/workflows/ci.yml

@@ -52,4 +52,4 @@ jobs:
         go mod download
 
     - name: Run tests
-      run: go test -p 1 ./...
+      run: make test

Makefile

@@ -0,0 +1,28 @@
+.PHONY: test
+test:
+	go test -p 1 ./...
+
+.PHONY: test-quick
+test-quick:
+	go test -p 1 -count=1 ./...
+
+.PHONY: test-race
+test-race:
+	go test -p 1 -race ./...
+
+.PHONY: format
+format:
+	go fmt ./...
+
+.PHONY: prepare-merge
+prepare-merge: format test
+
+.PHONY: ci
+ci: test
+
+.PHONY: ci-quick
+ci-full: test-quick
+
+.PHONY: install
+install:
+	go install -ldflags="-s -w" -v ./cmd/*