Migrate Hyprland to Lua config, drop dead flake inputs, general cleanup

Hyprland
- Switch wayland.windowManager.hyprland to configType = "lua" (Hyprland 0.56)
- Convert settings, env, monitors, window rules, gesture, animations
  (hl.curve/hl.animation) and all keybinds to hl.* calls
- Add home/system/hyprland/lib.nix with exec/bind/execOnce helpers;
  every exec-once now runs from a hyprland.start hook
- Drop hard-coded default_monitor = "eDP-2"

Flake
- Remove blog, awesome-wallpapers and default-creds inputs (their repos
  no longer ship a flake.nix and broke `nix flake update`), along with
  the server modules and Glance links that used them
- Update flake.lock
- Replace removed `gcr` with `gcr_4`

Fixes
- Point configDirectory at /etc/nixos/nixy on home-pc and thinkpad
- Fix home-pc git email typo
- Remove conflicting openpgp signing format, make pull.rebase a boolean,
  replace hx/peco in git aliases with nvim/sk
- Fix zsh NUL alias (2>&1) and stop forcing bat colors in the cat alias
- Require a password for sudo again (nixos-rebuild stays NOPASSWD)
- Remove duplicate hardware.graphics block from home-pc flake
- Delete unused zen .old files, run alejandra on host files

home/programs/git/default.nix

@@ -21,7 +21,7 @@ in {
       user.name = username;
       user.email = email;
       init.defaultBranch = "main";
-      pull.rebase = "false";
+      pull.rebase = false;
       push.autoSetupRemote = true;
       color.ui = "1";
       alias = {
@@ -43,10 +43,10 @@ in {
         af = "!git add $(git ls-files -m -o --exclude-standard | sk -m)";
         st = "status";
         br = "branch";
-        df = "!git hist | peco | awk '{print $2}' | xargs -I {} git diff {}^ {}";
+        df = "!git hist | sk | awk '{print $2}' | xargs -I {} git diff {}^ {}";
         hist = ''log --pretty=format:"%Cgreen%h %Creset%cd %Cblue[%cn] %Creset%s%C(yellow)%d%C(reset)" --graph --date=relative --decorate --all'';
         llog = ''log --graph --name-status --pretty=format:"%C(red)%h %C(reset)(%cd) %C(green)%an %Creset%s %C(yellow)%d%Creset" --date=relative'';
-        edit-unmerged = "!f() { git ls-files --unmerged | cut -f2 | sort -u ; }; hx `f`";
+        edit-unmerged = "!f() { git ls-files --unmerged | cut -f2 | sort -u ; }; nvim `f`";
       };
     };
   };