Add more typing information to manifold package

[tobiasdiez]

In extension of #29775, more typing information is added to the manifold package (and its dependencies).

Depends on #29775

CC: @tscrim @nthiery @mjungmath @egourgoulhon @fchapoton

Component: manifolds

Author: Tobias Diez

Branch/Commit: c403910

Reviewer: Matthias Koeppe, Tobias Diez, Michael Jung, Eric Gourgoulhon

Issue created by migration from https://trac.sagemath.org/ticket/31006

[sagetrac-git]

Changed commit from 8cfb932 to 874f853

[sagetrac-git]

Branch pushed to git repo; I updated commit sha1. New commits:

874f853

Remove symplectic stuff

[mkoeppe]

comment:3

from future import annotations is not available in Python 3.6, which we still support, so I am adding #30551 (Drop Python 3.6 support) as a dependency

[fchapoton]

comment:4

same in #30989

[tobiasdiez]

Dependencies: #30551

[tobiasdiez]

comment:5

Good to know, (but isn't #30053 already breaking 3.6 support?)

[mkoeppe]

comment:6

Replying to @tobiasdiez:

isn't #30053 already breaking 3.6 support?

That was temporary, just for one beta during the 9.2 cycle. Python 3.6 support was restored in #30576, #30740, #30758.

[fchapoton]

comment:7

red branch