feat: Allow custom script URLs

[ricardofiorani]

Type of Change

• Bugfix
• New feature
• Enhancement
• Refactoring
• Dependency updates
• Documentation
• CI/CD

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Description

This PR enhances the loadHyper function to allow passing a full script URL via the publishableKey field.

If the provided scriptURL starts with http:// or https://, it will now be treated as a direct URL to the HyperLoader.js script, overriding the default logic based on environment or key prefix. This makes it possible to load a custom or self-hosted version of the Hyperswitch loader.

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How did you test it?

• Manually verified that passing a full URL as publishableKey correctly loads the specified script.
• Confirmed fallback logic continues to load the appropriate default script for regular keys (pk_*).
• Ensured duplicate loader warning is still respected.
• Tested integration inside a real app using a custom Hyperswitch instance.

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Usage Notes

• ✅ No breaking changes.

• 🔧 New optional behavior for advanced users.

• Consumers can now do:

  loadHyper(publishableKey, {
      scriptURL: "https://my-custom-script.com/script.js",
  })

• Existing usage with pk_test_* or pk_prd_* remains unchanged.

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Checklist

• I ran npm run re:build and verified the build artifacts.
• I reviewed the code for style, readability, and consistency.
• I verified the changes are backward compatible (if applicable).
• I tested this change in a real or simulated consuming project.
• I updated documentation, README, or usage examples if necessary.

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Screenshots or Logs

N/A

[ricardofiorani]

I didn't found any CONTRIBUTING file, so sorry I didn't followed your convention but none was explicitly set.