Rebrand: Rename library and update "version" logic

Summary: Make the "version" data in Config show information. Also rename the library.

Test Plan: See version "branched from" information.

Reviewers: O1 Blessed Committers, speck

Reviewed By: O1 Blessed Committers, speck

Subscribers: speck, tobiaswiese, valerio.bozzolan, Matthew

Maniphest Tasks: T15006

Differential Revision: https://we.phorge.it/D25047