docs: update `radroots-app-core` readme - lib

commit 4c9dbf929b0aab0f359a752891f9fb5e7320c166
parent 0a48613e1225c82aa603a127646b00b272ebd415
Author: triesap <tyson@radroots.org>
Date:   Sun,  1 Mar 2026 15:13:28 +0000

docs: update `radroots-app-core` readme

	lib Core libraries for Radroots git clone https://radroots.dev/git/lib.git
	Log \| Files \| Refs \| README