docs: PR for Korean language

[jinoos]

What this PR does / why we need it:

This PR provides Korean translations for all Workshop documents to improve accessibility for Korean users.

Which issue(s) this PR fixes:

None.

Requires to author

I haven't modified website/docusaurus.config.js file, due to not comprehend any other impact.
website/docusaurus.config.js should be like below.

  i18n: {
    defaultLocale: 'en',
    locales: ['en', 'kr'],
    localeConfigs: {
      en: {
        htmlLang: 'en-US',
        // for current path
        path: 'docs',
      },
      kr: {
        htmlLang: 'ko-KR',
        // by this PR
        path: 'i18n/kr',
      },
    },
  },

And, I have checked and tested by below dev mode without docusaurus.config.js change.

npm run start -- --locale kr

Please let me know if you need any opinion about this PR applying.

Quality checks

• [v] My content adheres to the style guidelines
• [v] I ran make test module="<module>" it was successful (see https://github.com/aws-samples/eks-workshop-v2/blob/main/docs/automated_tests.md)
• [v] The PR has meaningful title and description of the changes that will be included in the workshop release notes

By submitting this pull request, I confirm that you can use, modify, copy, and redistribute this contribution, under the terms of your choice.

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[niallthomson]

Hi @jinoos we're currently discussing this PR internally. Will respond soon.

[niallthomson]

Closing this in favor of discussing in #1398 since we'll need a repeatable process to handle translating content every month as updates are made.