### Motivation:
To migrate to GitHub actions and centralised infrastructure.
### Modifications:
Changes of note:
* Adopt swift-format using rules from SwiftNIO
* Remove scripts and docker files which are no longer needed
### Result:
Feature parity with old CI.
* Add HTTP types adapter for SwiftNIO
* swiftformat
* Guard on Swift 5.8
* Review comments
* Update swift-http-types to 0.1.1
* Update swift-http-types to 1.0.0
* Review feedback
* Review feedback
* Bump minimum Swift version to 5.7.1
* Allow Host in any order