Add export to Word functionality with Markdown support

- Implemented a new plugin to export current conversation content from Markdown to Word (.docx) format.
- Added README_CN.md for Chinese documentation, detailing features, supported Markdown syntax, usage instructions, font configurations, and author information.
- Developed export_to_word.py to handle the conversion process, including title extraction, document creation, and file download triggering.
- Included support for various Markdown elements such as headings, lists, tables, and inline formatting.
- Ensured proper handling of Chinese and English text without encoding issues.

plugins/actions/export_to_docx/README.md

@@ -0,0 +1,48 @@
+# Export to Word
+
+Export current conversation from Markdown to Word (.docx) file with proper Chinese and English encoding.
+
+## Features
+
+- **One-Click Export**: Adds an "Export to Word" action button to the chat.
+- **Markdown Conversion**: Converts Markdown syntax to Word formatting (headings, bold, italic, code, tables, lists).
+- **Multi-language Support**: Properly handles both Chinese and English text without garbled characters.
+- **Auto Title Extraction**: Automatically uses the first heading as the filename.
+
+## Supported Markdown Syntax
+
+| Syntax                              | Word Result                    |
+| :---------------------------------- | :----------------------------- |
+| `# Heading 1` to `###### Heading 6` | Heading levels 1-6             |
+| `**bold**` or `__bold__`            | Bold text                      |
+| `*italic*` or `_italic_`            | Italic text                    |
+| `***bold italic***`                 | Bold + Italic                  |
+| `` `inline code` ``                 | Monospace with gray background |
+| ` ``` code block ``` `              | Code block with indentation    |
+| `[link](url)`                       | Blue underlined link text      |
+| `~~strikethrough~~`                 | Strikethrough text             |
+| `- item` or `* item`                | Bullet list                    |
+| `1. item`                           | Numbered list                  |
+| Markdown tables                     | Table with grid                |
+| `---` or `***`                      | Horizontal rule                |
+
+## Usage
+
+1. Install the plugin.
+2. In any chat, click the "Export to Word" button.
+3. The .docx file will be automatically downloaded to your device.
+
+## Font Configuration
+
+- **English Text**: Times New Roman
+- **Chinese Text**: SimSun (宋体) for body, SimHei (黑体) for headings
+- **Code**: Consolas
+
+## Author
+
+Fu-Jie  
+GitHub: [Fu-Jie/awesome-openwebui](https://github.com/Fu-Jie/awesome-openwebui)
+
+## License
+
+MIT License