Url util functions

[richarddavison]

Issue # (if available)

https://github.com/awslabs/llrt/issues/305 https://github.com/awslabs/llrt/issues/303

Description of changes

Implement URL utility functions

Checklist

• [x] Created unit tests in tests/unit and/or in Rust for my feature if needed
• [x] Ran make fix to format JS and apply Clippy auto fixes
• [x] Made sure my code didn't add any additional warnings: make check
• [x] Updated documentation if needed (API.md/README.md/Other)

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

[nabetti1720]

Hi @richarddavison. This description has been corrected in the past because it breaks Markdown.（See Also. d3483ef） Please allow me to confirm the intent of this part of the revision.

[richarddavison]

Hi @richarddavison. This description has been corrected in the past because it breaks Markdown.（See Also. d3483ef） Please allow me to confirm the intent of this part of the revision.

Thanks you're right, it's the formatter that breaks it! Let me update!