feat(themeing): Major refactor themeing for whole computer

Adds catppuccin nix flake for themeing lots of programs easily. This
enables proper themeing for:
* zathura
* imv
* fcitx (declarative settings)
* lazygit
* btop
* gtk

It also pulls in the home-manager sessionVars which is necessary to
theme applications.

The session vars change also reduces the number of env-vars that need to
be set in the zshrc due to them being set declaratively elsewhere.

users/home.nix

@@ -0,0 +1,36 @@
+{
+  ... }:
+let
+
+in {
+  catppuccin = {
+    enable = true;
+    flavor = "macchiato";
+    fcitx5.enable = false;
+    gtk.enable = true;
+    kvantum.enable = false;
+  };
+
+  qt = {
+    enable = true;
+    platformTheme.name = "qtct";
+  };
+
+  programs = {
+    btop = {
+      enable = true;
+      settings = {
+        theme_background = false;
+      };
+    };
+    imv.enable = true;
+    lazygit.enable = true;
+    wlogout.enable = true;
+    zathura = {
+      enable = true;
+      options = {
+        recolor-keephue = true;
+      };
+    };
+  };
+}

users/stitchynyan/default.nix

@@ -70,6 +70,14 @@
       type = "fcitx5";
       fcitx5 = {
         waylandFrontend = true;
+        settings.addons =  {
+          classicui.globalSection = {
+            Theme = "FluentLight";
+            DarkTheme = "FluentDark";
+            UseDarkTheme = "True";
+            UseAccentColor = "True";
+          };
+        };
         addons = with pkgs; [
           fcitx5-mozc
           fcitx5-fluent

users/stitchynyan/home.nix

@@ -19,7 +19,6 @@ let
     "grim"
     "hunspell"
     "hyprpaper"
-    "imv"
     "isync"
     "kitty"
     "libreoffice"
@@ -44,9 +43,7 @@ let
     "swayidle"
     "swaylock-effects"
     "tofi"
-    "wlogout"
     "wofi"
-    "zathura"
   ] pkgs ++ [ pkgs.hunspellDicts.en_US ];
 in
 {
@@ -77,7 +74,6 @@ in
     # To-Do Later
     home.sessionVariables = {
       FOO = "BAR";
-
     };
 
     home.file = {
@@ -159,7 +155,7 @@ in
         Unit.Description = "Syncs email";
         Timer = {
           OnBootSec = "1min";
-    OnUnitActiveSec = "10min";
+          OnUnitActiveSec = "10min";
         };
         Install.WantedBy = [ "timers.target" ];
       };