feat: Initial clean release of CHM

packages/htmlpack/README.md

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+# HTMLPACK
+
+Pack an HTML and all its JavaScript, CSS, image, fonts, and external files into a single HTML file. JavaScript and CSS is embedded in STYLE and SCRIPT tags, while all other files and images are converted to dataUri format and embedded in the document.
+
+## Usage
+
+```javascript
+import htmlpack from '@joplin/htmlpack';
+htmlpack('/path/to/input.html', '/path/to/output.html');
+```
+
+## Notes
+
+- The script works in synchronous way so it will block the calling process while running.
+- No security check on what's included.
+
+## License
+
+MIT