refactor(Magefile): add build info in backend:build through ldflags

internal/utils/version.go

@@ -0,0 +1,21 @@
+package utils
+
+var (
+	version    = "dev"
+	commitHash = "none"
+	buildDate  = "unknown"
+)
+
+type Info struct {
+	Version    string
+	CommitHash string
+	BuildDate  string
+}
+
+func Version() Info {
+	return Info{
+		Version:    version,
+		CommitHash: commitHash,
+		BuildDate:  buildDate,
+	}
+}