RSCBC-1: Implement HTTP Crate

[Matt-Woz]

Changes

• Created HTTP Client, wrapping reqwest
• Created custom JSON Row parser + stream

[chvck]

This is great. It might be a good idea to move the integration tests to the top level tests crate and think about how we can add an abstraction layer between us and reqwest. That'd both decouple us a bit and let us unit test more easily.

[chvck]

This is looking good to me, just the minor thing about #[non_exhaustive] so that expanding request blocks aren't breaking changes in the future. In the future we might want to think about using hyper but this shields any upstream crates from that too.