* Bump min Swift to 5.8, add feature flags
* Mark as many things Sendable as we can
* Package structure and CI updates
* MirrorBypass is valid in 5.10 (looks like it'll be valid in 6.0 too, but holding off on that just in case)
* SomeCodingKey is now provided by SQLKit
* Add the missing utilities for encoding Fluent models to SQLKit queries
* Minor code and docs cleanup
* Update the fake database used for testing to be more flexible and fix tests accordingly
* Add tests for new FluentSQL APIs
* Remove the last few uses of print() (all in tests)
* Fix locking of QueryHistory