feat: 🎸 add default configs for crepe

[Saul-Mirone]

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Summary

Add default configs for crepe. Make it possible to partially load languages in codemirror.

const builder = new CrepeBuilder({
  root: '#app',
  defaultValue: markdown,
})

builder.addFeature(codeMirror, {
  languages: [
    LanguageDescription.of({
      name: "Markdown",
      extensions: ["md", "markdown", "mkd"],
      load() {
        return import("@codemirror/lang-markdown").then(m => m.markdown())
      }
    }),
  ]
});

builder.create();

Load only one language:

Load all languages:

How did you test this change?

CI and manaully.

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Latest commit: 9fa889b

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