Split http module into multiple files

[bgreni]

Module structure remains the same for users (import paths are the same as before), but request and response have their own files to keep things easier to maintain as their complexity grows.

[saviorand]

Just pushed , I removed the sys package since it's not needed now that we removed the Python Client/Server implementations

[bgreni]

@saviorand Just a friendly ping that I recently finally got around to addressing your feedback

[saviorand]

@bgreni thanks for the ping. Double-checked everything, looking good. Removed a couple print statements. Merging now.

[saviorand]

Thanks for this contribution! 🙏