Add support for new Wiki markdown features

[Su5eD]

The proposal

Adds support for new MD syntax and features introduced in a Wiki update last week, as well as some missing functionality from GFM markdown extensions.

Changes

• Added support for new Callout variants including aliases based on the wiki equivalent
  • Supports collapsible callouts as well
• Added support for GitHub Alert syntax
• Added support for tables
• Added support for ?[]() hover hint text
• Added support for using asset locations in image sources
• Added support for using image attributes and flags, such as width, height, center and right
• Images with alt text will be displayed as figures
• Heading attributes will be read and stripped as the mod doesn't need them
• Added support for block quotes
• Added support for enhanced code blocks
  • Displaying file name attributes and the language used
  • Support for code tabs
• Added support for playing audio from wiki assets using the Audio component
• Added support for video embeds (they will show up as buttons with a link)

Testing

I added examples for all new features to introduction.mdx, you can run the test client and verify everything displays as intended.

[Rearth]

Oh wow, this is a big one, but its looking pretty good. Huge thanks for all the work here, and sorry for the late response. I really appreciate all the work that went into this. When testing things locally, it worked pretty well. I noticed a few very minor issues but I can fix those. I'll go ahead and merge this and then hopefully release it soon.