feat: add tags workflow

src/utils/yamlScalar.ts

@@ -0,0 +1,11 @@
+/** Quote a YAML scalar for a single-line frontmatter value. */
+export function yamlInlineScalar(value: string): string {
+	if (value === "") {
+		return '""';
+	}
+	// Safe unquoted token (no spaces / special YAML chars).
+	if (/^[A-Za-z0-9_./+-]+$/.test(value)) {
+		return value;
+	}
+	return JSON.stringify(value);
+}