#### Features
- Uses the latest [github-markdown.css](https://github.com/sindresorhus/github-markdown-css/blob/main/github-markdown.css) file that contains styling support for both dark and light mode.
- Table of Contents has an improved design, and:
- The width can be resized.
- TOC headings are automatically highlighted to help track your position in the file.
- Improved fullscreen layout based on Github.com behavior.
- External links clicked will open in default browser instead of doing nothing.
- Uses [markdownItAnchor](https://github.com/valeriangalliat/markdown-it-anchor) to allow heading anchor links in the file to work.
- Uses [highlight.js](https://github.com/highlightjs/highlight.js) to provide syntax highlighting to codeblocks.
#### Changes
- Made changes to allow the `md2html.html` file to use relative file imports for better maintainability.
- MarkdownViewer can now easily be customized by users by modifying files in `<Quicklook data folder>/QuickLook.Plugin.MarkdownViewer/`
- Caching and `localStorage` is now supported thanks to these changes.
- Prevent default behavior of spacebar scrolling the page, while we use spacebar to dismiss the preview.
- Sets `WebView` `DefaultBackgroundColor` to prevent white flash in dark mode. After the page has loaded, sets `DefaultBackgroundColor` back to white to have the expected default behavior on HTML pages that don't specify any background color.
#### Clean up
- Removed the need for `jQuery`.
- Removed old polyfill code.
Comic book archive is not a distinct file format. It is a filename extension naming convention.
The filename extension indicates the archive type used:
.cb7 → 7z
.cbr → RAR
.cbt → TAR
.cbz → ZIP
* Replace supported image extension list with image detection via MagickImageInfo.
* Change ImageViewer priority to -4.
Change VideoViewer priority to -3 and detect audio/video via MediaInfo instead of file extensions.
* Make mediaInfo a class static and initialize once.
Add some notes about MediaInfo Open and Close.
* Remove try/catch from Prepare and let it be handled in caller.
If there was an exception due to MediaInfo it would have already occurred in CanHandle.
* Upgrade ImageMagick to latest
* Only check extension for well known image and animated image types.
For other image formats, let ImageMagick try to detect by file content.
Upgrade to latest Magick.NET
Co-authored-by: Frank Becker <frank.becker@thoughtexchange.com>
