github: move all GitHub logic to dedicated class (bug 1996507, bug 1995679)#604

shtrom merged 18 commits intozeid/bug-1989635-github-pr-pilotmozilla-conduit/lando:zeid/bug-1989635-github-pr-pilotfrom

no-bug/github-api-url-parsingmozilla-conduit/lando:no-bug/github-api-url-parsingCopy head branch name to clipboard