SquibView Lean ESM Build Example

This example demonstrates the lean ESM build (squibview.esm-lean.min.js) which requires you to manage dependencies yourself. This build is smaller (122KB vs 241KB) but requires:

• markdown-it - For Markdown parsing
• diff-match-patch - For revision history
• tiny-emitter - For event handling

This approach is useful when you're already using these libraries in your project or when you need fine control over dependency versions.