Auto load folder to generate plugin config

[rohit-gohri]

Closes #150

Add support for openapi option, example:

presets: [
      '@docusaurus/preset-classic',
    [
      'redocusaurus',
      {
        // This will automatically load all spec files with `.openapi.yaml` or `.openapi.json` suffix and generate route/ids for it based on file path
        openapi: {
          folder: 'openapi',
          routeBasePath: '/api
        },
        theme: {
          /**
           * Highlight color for docs
           */
           primaryColor: '#1890ff',
        },
      },
    ]
  ],

[changeset-bot]

🦋 Changeset detected

Latest commit: f259a9a

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 2 packages

Name	Type
docusaurus-plugin-redoc	Minor
redocusaurus	Minor

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Name	Status	Preview	Updated (UTC)
redocusaurus	✅ Ready (Inspect)	Visit Preview	Mar 8, 2024 7:06pm

[github-actions]

This pull request is automatically built and it is testable by installing [email protected].

For commit 0e03435025738dc21023480760ce258c3b02acfe.