Manually track loaded Prism components

[MattIPv4]

Type of Change

• Markdown-It Plugins: Prism

What issue does this relate to?

cc #69

What should this PR do?

Manually track what Prism components we've loaded, so that we don't repeatedly load components that don't directly load a new language (e.g. modifiers like js-templates that modifies javascript).

What are the acceptance criteria?

Modifier components aren't repeatedly loaded when a language that loads one is used in multiple code blocks.

For example, using typescript loads jsx which loads js-templates:

 ```ts
 console.log('test')
 ```

 ```ts
 console.log('test')
 ```