Use fmt or spdlog for console logging

[mjcarroll]

We could potentially clean up a good bit of stream based logging by using something like spdlog or {fmt}

https://github.com/gabime/spdlog
https://fmt.dev/latest/index.html

Note that fmt is very similar to std::format which landed in C++20.

Considerations:

• Not breaking ABI
• Not breaking existing code?

[azeey]

Since we're targeting ionic, it'll be okay to break ABI.

[azeey]

Resolved by #615