add kak pager and use it for man pages

user/home.nix

@@ -24,6 +24,7 @@ in {
     ./fzf.nix
     ./ranger
     ./pass.nix
+    ./man.nix
     inputs.hyprland.homeManagerModules.default
   ] ++ lib.optional (desktop == "sway") ./sway.nix;
 

user/kakoune.nix

@@ -128,6 +128,7 @@ in {
       bmenu
       kak-lsp
       kak-pager
+      kak-man-pager
     ];
     home.sessionVariables = {
       EDITOR = "kak";

user/man.nix

@@ -0,0 +1,14 @@
+{ config, pkgs, lib, inputs, ... }:
+let inherit (import ./variables.nix) key theme color accent font desktop;
+in {
+  config = {
+    programs.man = {
+      enable = true;
+      generateCaches = true;
+    };
+    home.sessionVariables = {
+      PAGER = "${pkgs.kak-pager}/bin/kak-pager";
+      MANPAGER = "${pkgs.kak-man-pager}/bin/kak-man-pager";
+    };
+  };
+}