(Feat): Follow semantic versioning

internal/version/version.go

@@ -0,0 +1,19 @@
+package version
+
+import "fmt"
+
+const (
+	Major = 1
+	Minor = 0
+	Patch = 3
+)
+
+// Version returns the semantic version string
+func Version() string {
+	return fmt.Sprintf("%d.%d.%d", Major, Minor, Patch)
+}
+
+// FullVersion returns the version with app name
+func FullVersion() string {
+	return fmt.Sprintf("Zipprine v%s", Version())
+}