infra/libkookie: init project

Adding an empty directory and basic outline of libkookie, my personal
collection of nix expressions, and toolkit for building my system
configurations.

This project previously was part of kookienomicon, but was removed due
to technical debt in the way that it was structured.  I deemed it a
better approach to start anew, to try to limit the exposure of past
mistakes.

infra/libkookie/README

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+                +---------------------------+
+                |                           |
+                |         LIBKOOKIE         |
+                |                           |
+                +---------------------------+
+
+This is my personal collection of nix expressions.
+
+
+Structure
+---------
+
+This repository contains a subtree of nixpkgs, a set of custom
+modules, a set of overlays for both custom and patched packages, as
+well as root configurations for each of my computers.
+
+If you come across my old kookiepkgs, or nixcfg repositories, please
+ignore them: this collection replaces them both.
+
+- ext: possible private extensions
+- modules: custsom configuration module system
+- configuration: set of use-case-specific configurations
+- nixpkgs: subtree of nixpkgs (follows unstable - updated regularly)
+- overlays/kookie: custom out-of-nixpkgs packages
+- overlays/patches: patches to upstream packages
+- ovrelays/staging: staging area for upstream work
+- roots: available entry-points (device configuration)
+
+
+How to use
+----------
+
+Use ./build to build and switch to a new libkookie configuration.  A
+more advanced (work in progress) build tool (that requires some
+bootstrapping) can be found in stage1/.
+
+
+License
+-------
+
+The nixpkgs subtree, as well as the package overlays are licensed
+under the MIT public license.  My custom modules (modules/, and
+configuration/ ), configuration roots, and stage1 builder are licensed
+under the GNU Public License 3.0 (or later).
+

infra/libkookie/ext/.gitkeep

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+