beatific: Add beatific.extraPrograms

This is partly a way to keep notes on useful software that I might otherwise forget about

machine/imperium/default.nix

@@ -50,6 +50,7 @@
   hardware.opengl.enable = true;
   hardware.opengl.driSupport32Bit = true;
 
+  beatific.extraPrograms = true;
   environment.systemPackages = with pkgs; [
     firefox
     libreoffice

modules/beatific.nix

@@ -26,6 +26,12 @@ in {
         default = false;
       };
 
+      extraPrograms = mkOption {
+        type = types.bool;
+        description = "Additional default programs";
+        default = false;
+      };
+
       # Groups of related defaults can be disabled by flipping off the switches here:
       #   beatific.defaults.${category} = false;
       # They default to true because the point is to do these things by default.
@@ -107,6 +113,14 @@ in {
       environment.variables.EDITOR = mkOverride 999 "vim";
     })
 
+    (mkIf cfg.extraPrograms {
+      environment.systemPackages = with pkgs; [
+        calibre  # provides ebook-convert
+        imagemagick  # image convertion cli
+        tesseract  # OCR engine
+      ];
+    })
+
     (mkIf cfg.defaults.ssh {
       services.openssh.enable = true;
       services.openssh.banner = let