Update documentation examples to ES6 #7636

[DeekshaVarshney123]

Hello Webpack Team,

This Pull Request addresses Issue #7636 by updating documentation examples to use ES Modules syntax (import/export default) instead of CommonJS (require/module.exports).

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🛠️ Current Changes

For an initial review, I have only updated two key guides in the guides section:

1. src/content/guides/getting-started.mdx
2. src/content/guides/asset-management.mdx

💡 Request for Review

Could you please review these changes to ensure:

• The ES Modules syntax has been implemented correctly across all webpack.config.js code blocks in these two guides.
• The approach (changing syntax within diff blocks where necessary) aligns with the documentation contribution standards.

If the changes are satisfactory, I will proceed to update the remaining documentation files for Issue #7636. If any modifications or additional steps are required, please let me know.

Thank you for your time!

[vercel]

@DeekshaVarshney123 is attempting to deploy a commit to the OpenJS Foundation Team on Vercel.

A member of the Team first needs to authorize it.

[linux-foundation-easycla]

The committers listed above are authorized under a signed CLA.

• ✅ login: DeekshaVarshney123 / name: Deeksha Varshney (51ea1c3, 84ebcc2)

[DeekshaVarshney123]

Hello Webpack Maintainers,

I'm confirming that the Link Check, Unit Test, and Lint checks are all failing due to a dependency lockfile error.

The logs show: error Your lockfile needs to be updated, but yarn was run with "--frozen-lockfile".

This indicates that either the yarn.lock file is missing or severely outdated in my branch's history, blocking the CI from proceeding. Since I cannot update the lockfile locally (due to CI configuration dependencies), could a maintainer please update the yarn.lock file in the main branch or bypass the --frozen-lockfile check?

My code changes (ES Modules syntax updates) are clean and ready for review once the tests pass.

Thank you for your help!
Fixes #7636