Support configuring the codemirror editor with plugins

[petyosi]

For example, this should allow the developer to specify additional syntax files (C, C++).

[ajboni]

Can you guide me a little on how would this be achieved?

I guess we need to extend the <TheEditorFromSandpack/> with additional languages like described here
and make the plugin accept that parameter

[petyosi]

My plans are to replace the TheEditorFromSandpack with a vanilla CodeMirror implementation. From there on, it's a matter of putting the additional plugins as arguments of the codemirrorPlugin, then fetching them through the internal state system.