feat: support loading packages' JSON index and main

[sheerlox]

Description

Add the ability to import an NPM package that contains an index.json file or has a main field pointing to a JSON file.

References

• feat: add support for ESM presets semantic-release/commit-analyzer#537 (comment)
• Support extending ESM based configurations semantic-release/semantic-release#3037 (comment)
• sheerlox/semantic-release@4009af3
• https://github.com/semantic-release/semantic-release/blob/02f2cb1c8b0e33b9ed3d7c27038423be61f7a7e0/test/get-config.test.js#L323-L347

[sheerlox]

🎉 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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