revamp of structure

modules/boot/plymouth.nix

@@ -0,0 +1,25 @@
+{pkgs,...}: 
+{
+  boot.consoleLogLevel = 3;
+  boot.initrd.verbose = false;
+  boot.kernelParams = [
+    "quiet"
+    "udev.log_priority=3"
+    "rd.udev.log_level=3"
+    "rd.systemd.show_status=auto"
+  ];
+
+  boot.plymouth = {
+    enable = true;
+    theme = "bgrt";
+    package = pkgs.plymouth.overrideAttrs (old: {
+      postInstall = (old.postInstall or "") + ''
+        sed -i \
+          -e 's/DialogClearsFirmwareBackground=true/DialogClearsFirmwareBackground=false/' \
+          -e 's/DialogVerticalAlignment=.382/DialogVerticalAlignment=.55/' \
+          -e 's/TitleVerticalAlignment=.382/TitleVerticalAlignment=.55/' \
+          $out/share/plymouth/themes/bgrt/bgrt.plymouth
+      '';
+    });
+  };
+}