Initial Adding of i3. Wayland is a bit of pain right now.

modules/applications/default.nix

@@ -10,5 +10,6 @@
     ./nextcloud.nix
     ./spotify.nix
     ./sway
+    ./i3
   ];
 }

modules/applications/i3/default.nix

@@ -0,0 +1 @@
+{ config, pkgs, ... }: { imports = [ ./i3.nix ]; }

modules/applications/i3/i3.nix

@@ -0,0 +1,29 @@
+{ config, lib, pkgs, ... }:
+let
+  cfg = config.this.application.i3;
+  graphical = config.this.graphical;
+  modifier = "Mod4";
+  wallpaper = pkgs.fetchurl {
+    url =
+      "https://raw.githubusercontent.com/catppuccin/wallpapers/main/landscapes/evening-sky.png";
+    sha256 = "sha256-fYMzoY3un4qGOSR4DMqVUAFmGGil+wUze31rLLrjcAc=";
+  };
+
+in with lib; {
+  options = {
+    this.application.i3.enable = mkOption {
+      default = graphical.enable;
+      type = with types; bool;
+    };
+  };
+
+  config = mkif cfg.enable {
+    this.graphical.protocol = "X11";
+    home-manager.users.james = {
+      xsession.windowManager.i3 = {
+        enable = true;
+        package = "pkgs.i3-gaps";
+      };
+    };
+  };
+}