feat: initial m3ta-home structure

- flake.nix with nixpkgs, home-manager, nix-colors, m3ta-nixpkgs, agenix, NUR inputs
- lib/mkHome.nix: compose HM config from user + identity + context + sets
- profiles/base: shell, cli-tools, secrets (always loaded)
- profiles/contexts/desktop: WM, apps, theme, ghostty
- profiles/contexts/server: minimal headless
- profiles/sets/coding: core (git, direnv, jq, rg), editor, lsp, languages, agents
- profiles/sets/gaming: steam, gamescope, gpu
- profiles/sets/media: obs, ffmpeg, kdenlive, handbrake, yt-dlp
- users/m3tam3re/identities: private.nix, work.nix (git, jj, ssh per identity)
- users/m3tam3re/preferences: cliphist, difftastic, base packages

profiles/contexts/desktop/wm/wayland.nix

@@ -0,0 +1,30 @@
+# Wayland extra tooling — screenshot, clipboard, cursor, and display utilities.
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}:
+with lib; let
+  cfg = config.desktop.wm.wayland;
+in {
+  options.desktop.wm.wayland.enable = mkEnableOption "wayland extra tools and config";
+
+  config = mkIf cfg.enable {
+    home.packages = with pkgs; [
+      grim
+      hyprcursor
+      hyprlock
+      hyprpaper
+      qt6.qtwayland
+      slurp
+      waypipe
+      wl-clipboard
+      wf-recorder
+      wl-mirror
+      wlogout
+      wtype
+      ydotool
+    ];
+  };
+}