Upgrade ktor, ktorfit deps, add logback and finally implement kermit custom logger. Rename library subproject to temerity.

Set up spotless to format using ktlint, move license and add headers for library files

Rebase on template from https://terrakok.github.io/kmp-web-wizard/, drawing inspiration from https://github.com/skydoves/sandwich and https://github.com/Foso/Ktorfit