meta(hyprland): Add hycov plugin

This cool plugin makes it possible to press "alt+tab" in order to switch
between all windows in Hyprland, particularly useful if a certain window
you want to focus is a few workspaces away from your current one.

It's also possible to swipe up with 4 fingers to show hycov, from which
you can then use 3 finger motions to switch between the shown windows.

Finally, it's possible to show hycov by simply hovering over the bottom
right part of the screen, similar to the "show desktop" functionality in
certain desktop environments and GNOME's hot corner feature.

home/hyprland.nix

@@ -11,6 +11,14 @@ in
     hyprlock
   ];
 
+  wayland.windowManager.hyprland = {
+    enable = true;
+
+    plugins = [
+      (pkgs.callPackage ../packages/hycov.nix { })
+    ];
+  };
+
   xdg.configFile."hypr/gaps.sh" = {
     executable = true;
     text = /* bash */ ''
@@ -334,6 +342,21 @@ in
     bind = $SUPER_SHIFT, 1, exec, hyprnome --previous --move
     bind = $SUPER_SHIFT, 2, exec, hyprnome --move
 
+    bind = ALT, tab, hycov:toggleoverview
+    bind = ALT, h, hycov:movefocus,l
+    bind = ALT, l, hycov:movefocus,r
+    bind = ALT, k, hycov:movefocus,u
+    bind = ALT, j, hycov:movefocus,d
+
+    plugin {
+      hycov {
+        hotarea_pos = 2
+        enable_gesture = 1
+        enable_alt_release_exit = 1
+        alt_toggle_auto_next = 1
+      }
+    }
+
     bind = CTRL, Alt_L, submap, passthrough
     submap = passthrough
     bind = CTRL, Alt_L, submap, reset

packages/hycov.nix

@@ -0,0 +1,29 @@
+{
+  lib,
+  stdenv,
+  hyprland,
+  fetchFromGitHub,
+}:
+
+stdenv.mkDerivation {
+  pname = "hycov";
+  version = "0.1";
+
+  src = fetchFromGitHub {
+    owner = "Ayuei";
+    repo = "hycov";
+    rev = "db6ea8a24f0a58fa69f86db49d7c853754b1b8e1";
+    hash = "sha256-fSujEAViKqQusHyYe7Qg8QnLlyUNOf0/Jk1P70BmiyE=";
+  };
+
+  inherit (hyprland) nativeBuildInputs;
+
+  buildInputs = [ hyprland ] ++ hyprland.buildInputs;
+
+  meta = with lib; {
+    homepage = "https://github.com/Ayuei/hycov";
+    description = "Clients overview for hyprland plugin";
+    license = licenses.mit;
+    platforms = platforms.linux;
+  };
+}