* move some operations to main
* move more options to main
* move cookies and multipart
* remove cert legacy migration
* move auth and aws helper
* move certs options to main
* remove libcurl usage from renderer and tidy
* extract oauth2 flow back to renderer
* add parse headers tests
* minimally type req
* organise libcurl-promise by req properties
* minimally type used settings
* tidy up debug timeline
* fix cookie bug
* tasty little parsing function refactor
* doh! trim
* tidy up set cookie method/self review
* extracted functions from set-cookie logic
* refactoring with tests
* formatting after rebase
* clarification of duplicate header support
* tighten up parse headers
* simplify aws signing
* fix app version imports
