refactor!: restructure and document configuration

shared/home-manager/theming.nix

@@ -0,0 +1,79 @@
+{ pkgs, ... }:
+
+{
+  home.packages = with pkgs; [
+    ibm-plex
+    nerd-fonts.blex-mono
+    nerd-fonts.symbols-only
+    libsForQt5.qtstyleplugin-kvantum
+    libsForQt5.qtwayland
+    qt6Packages.qtstyleplugin-kvantum
+    qt6Packages.qtwayland
+  ];
+
+  home.file = {
+    ## Kvantum's theme configuration.
+    ".config/Kvantum/catppuccin-frappe-lavender" = {
+      source = "${
+        pkgs.catppuccin-kvantum.override {
+          accent = "lavender";
+          variant = "frappe";
+        }
+      }/share/Kvantum/catppuccin-frappe-lavender";
+    };
+
+    ".config/Kvantum/kvantum.kvconfig".text = ''
+      [General]
+      theme=catppuccin-frappe-lavender
+    '';
+    ##
+
+    ## Theming configuration for qt5 and qt6
+    ".config/qt5ct/colors".source = ./dotfiles/qt5ct;
+
+    ".config/qt6ct/colors".source = ./dotfiles/qt5ct; # We use the qt5ct because it's the SAME spec
+    ##
+
+    ".local/share/SpeedCrunch/color-schemes/catppuccin-frappe.json" = {
+      recursive = true;
+      source = builtins.fetchurl {
+        url = "https://raw.githubusercontent.com/catppuccin/speedcrunch/34f2b382de0188d2fd85f59a8a366f313fc30a71/themes/catppuccin-frappe.json";
+        sha256 = "sha256:0imx5a53p3ls5kddplgr7mbpbidrmzl9qiwpv7r8jjmsf8yxs0i4";
+      };
+    };
+  };
+
+  home.pointerCursor = {
+    package = pkgs.catppuccin-cursors.frappeLavender;
+    name = "catppuccin-frappe-lavender-cursors";
+
+    size = 24;
+
+    gtk.enable = true;
+    x11.enable = true;
+  };
+
+  # Configure GTK.
+  gtk = {
+    enable = true;
+
+    gtk3.extraConfig = {
+      gtk-application-prefer-dark-theme = true;
+    };
+
+    gtk4.extraConfig = {
+      gtk-application-prefer-dark-theme = true;
+    };
+
+    iconTheme = {
+      name = "Papirus-Dark";
+      package = pkgs.papirus-icon-theme.override { color = "violet"; };
+    };
+  };
+
+  # Configure QT
+  qt = {
+    enable = true;
+    platformTheme.name = "qtct";
+  };
+}