Adds a cloudflare miner for the sprout subnet on bittensor

[GuiBibeau]

Description of the pull request

As Sprout aims to offer a gateway to open source and decentralized AI, this PR introduces a component that will allow us to build a bittensor subnet focusing on giving access to open source models. This first miner will just allow calling cloudflare hosted models. the next ones will focus on self hosted and custom models.

After this is merged I have a couple of followups:

1. bring in the validator code
2. create a common API layer for miners.
3. create the self hosted miner
4. create a load balancing and network discovery layer connected to subnet metagraph

Changes made

• New package
• brings in the code gradually from another that was private that I intend to merge with Sprout
• ....

Related issues

Testings done

Screenshots (if any)

Checklist

• I have written tests
• My code does not produce new errors
• I gave myself a code review before asking others.