Allow a default editor for code blocks, including when a language isn't specified

[FinlayBP]

I'm currently running the code block and code mirror plugins as follows:

codeBlockPlugin({ defaultCodeBlockLanguage: 'txt' }),
codeMirrorPlugin({
  codeBlockLanguages: {
    txt: 'text',
    js: 'JavaScript',
    ts: 'TypeScript',
    tsx: 'TypeScript (React)',
    jsx: 'JavaScript (React)',
    css: 'CSS',
    python: 'Python',
    bash: 'Bash',
  },
}),

But when users add empty backticks without a language specified:

` ` `
blah
` ` `

They currently recieve an error boundary because Error: No CodeBlockEditor registered for language=null meta=null. Perhaps there could be a defaultCodeBlockEditor just like there's a defaultCodeBlockLanguage?

I imagine this would also remove the need to specify a large object of codeBlockLanguages if I want to use the codeMirrorPlugin for everything.

I had a go at the following as per the discussion in #95 (comment), but CodeMirrorEditor isn't exported at the moment so this doesn't work:

codeBlockEditorDescriptors: [
  {
    priority: 100,
    match: () => true,
    Editor: CodeMirrorEditor,
  },
],

[petyosi]

True, makes sense. Want to open a PR for the code mirror editor export? I feel like this is the easiest solution.

[github-actions]

🎉 This issue has been resolved in version 1.3.0 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

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