Move Nix files into a nix directory

Move everything from `config` to the root level.

nix/lib/shared/home-manager-packages.nix

@@ -0,0 +1,83 @@
+{
+  desktop,
+  inputs,
+  pkgs,
+  username,
+  ...
+}:
+let
+  php = pkgs.php82;
+  phpPackages = pkgs.php82Packages;
+
+  inherit (pkgs) writeShellApplication;
+
+  _timer = writeShellApplication (import ./scripts/_timer.nix);
+  create-zellij-session = writeShellApplication (
+    import ./scripts/create-zellij-session.nix { inherit pkgs; }
+  );
+  deliver = writeShellApplication (import ./scripts/deliver.nix { inherit pkgs; });
+  export-video-list = writeShellApplication (
+    import ./scripts/export-video-list.nix { inherit pkgs username; }
+  );
+  run = writeShellApplication (import ./scripts/run.nix { inherit pkgs; });
+  t = writeShellApplication (import ./scripts/t.nix { inherit pkgs; });
+  timer = writeShellApplication (import ./scripts/timer.nix);
+in
+with pkgs;
+[
+  age
+  awscli2
+  bitwarden-cli
+  bottom
+  cachix
+  ctop
+  delta
+  devenv
+  dog
+  doppler
+  entr
+  fd
+  file
+  gcc
+  gh
+  git
+  git-crypt
+  gnupg
+  go
+  inotify-tools
+  jq
+  killall
+  lua
+  mariadb
+  mob
+  php
+  phpPackages.composer
+  pv
+  rustywind
+  simple-http-server
+  sshs
+  tldr
+  tree
+  tree-sitter
+  unzip
+  virtualenv
+  watchexec
+  wget
+  xclip
+  xcp
+  xdg-utils
+  xh
+  yarn
+
+  # Scripts.
+  create-zellij-session
+  deliver
+  run
+  t
+]
+++ pkgs.lib.optionals desktop [
+  # Scripts.
+  _timer
+  export-video-list
+  timer
+]