This PR adds a bit of typing information to some of the methods in the manifolds module.

CC: @tscrim @nthiery @mjungmath @fchapoton

Component: manifolds

Keywords: typing

Author: Tobias Diez

Branch/Commit: 7c18c7f

Reviewer: Matthias Koeppe, Tobias Diez, Eric Gourgoulhon

Issue created by migration from https://trac.sagemath.org/ticket/29775