feat(release): add plugin packaging script and release notes

scripts/package-plugin.mjs

@@ -0,0 +1,15 @@
+import fs from "node:fs";
+import path from "node:path";
+
+const root = process.cwd();
+const pluginDir = path.join(root, "plugin");
+const outDir = path.join(root, "dist", "plugin");
+
+fs.rmSync(outDir, { recursive: true, force: true });
+fs.mkdirSync(outDir, { recursive: true });
+
+for (const f of ["index.ts", "rules.ts", "openclaw.plugin.json", "README.md", "package.json"]) {
+  fs.copyFileSync(path.join(pluginDir, f), path.join(outDir, f));
+}
+
+console.log(`packaged plugin to ${outDir}`);