feat(skills): add 6 generalized AI-driven development skills

- version-bumper: automated multi-file version synchronization
- plugin-scaffolder: standardized 12-language i18n template generation
- doc-mirror-sync: automated README to docs mirroring
- i18n-validator: dictionary key alignment analysis via AST
- gh-issue-replier: professional English reply with star-check logic
- gh-issue-scheduler: unanswered issue audit and action planning

.gemini/skills/plugin-scaffolder/assets/README_template.md

@@ -0,0 +1,34 @@
+# {{TITLE}}
+
+**Author:** [Fu-Jie](https://github.com/Fu-Jie/openwebui-extensions) | **Version:** 0.1.0 | **Project:** [OpenWebUI Extensions](https://github.com/Fu-Jie/openwebui-extensions) | **License:** MIT
+
+{{DESCRIPTION}}
+
+## 🔥 What's New in v0.1.0
+
+* Initial release of {{TITLE}}.
+
+## 🌐 Multilingual Support
+
+Supports automatic interface and status switching for the following languages:
+`English`, `简体中文`, `繁體中文 (香港)`, `繁體中文 (台灣)`, `한국어`, `日本語`, `Français`, `Deutsch`, `Español`, `Italiano`, `Tiếng Việt`, `Bahasa Indonesia`.
+
+## ✨ Core Features
+
+* Feature 1
+* Feature 2
+
+## How to Use 🛠️
+
+1. Install the plugin in Open WebUI.
+2. Configure settings in Valves.
+
+## Configuration (Valves) ⚙️
+
+| Parameter | Default | Description |
+| :--- | :--- | :--- |
+| `priority` | `50` | Execution priority. |
+
+## ⭐ Support
+
+If this plugin has been useful, a star on [OpenWebUI Extensions](https://github.com/Fu-Jie/openwebui-extensions) is a big motivation for me. Thank you for the support.