refactor: drop disko, simplify inputs, centralize fuse/rclone, bump state versions

- Remove disko everywhere:
  - Delete hosts/Nixbook/disko.nix and hosts/Nixtest/disko.nix
  - Drop disko input, modules, and disko-install app
  - Update README to remove disko mention
- Simplify flake inputs:
  - Use nixpkgs = nixos-unstable only
  - Home Manager -> master (follows nixpkgs)
  - Remove nixpkgs-unstable and vscode-extensions
  - Pass allowUnfree via specialArgs
- Centralize storage tools:
  - Add fuse3 and rclone to hosts/common/default.nix
  - Remove hosts/common/rclone.nix and screen.nix
  - Add user thiago to "fuse" group
  - Drop per-host rclone packages
- NVIDIA module:
  - Use pkgs.linuxPackages.nvidiaPackages.latest (no unstable import)
  - Keep nvidiaSettings=true, open=false
  - Remove sunshine service block
- Hosts:
  - Nixstation: remove Hyprland block, zramSwap 30% -> 25%
  - Clean hardware-configuration args
- Versions:
  - system.stateVersion: 24.05 -> 25.11 (Nixstation)
  - home.stateVersion: 24.05 -> 25.11
- README: adjust Nixbook and common modules descriptions

hosts/Nixbook/default.nix

@@ -48,7 +48,6 @@
     neovim
     nil
     nixpkgs-fmt
-    rclone
     wget
   ];
 

hosts/Nixbook/disko.nix

@@ -1,68 +0,0 @@
-{ config, lib, ... }:
-
-{
-  disko.devices = {
-    disk.main = {
-      type = "disk";
-      device = "/dev/nvme0n1";
-      content = {
-        type = "gpt";
-        partitions = {
-          esp = {
-            size = "512M";
-            start = "1M";
-            type = "EF00";
-            label = "EFI";
-            content = {
-              type = "filesystem";
-              format = "vfat";
-              mountpoint = "/boot";
-            };
-          };
-          swap = {
-            size = "16G";
-            type = "8200";
-            label = "Swap";
-            content = {
-              type = "swap";
-              randomEncryption = false;
-            };
-          };
-
-          root = {
-            type = "8300";
-            label = "NixOS";
-            size = "870G";
-            content = {
-              type = "btrfs";
-              mountpoint = "/";
-              subvolumes = {
-                "@root" = {
-                  mountpoint = "/";
-                };
-                "@nix" = {
-                  mountpoint = "/nix";
-                };
-                "@home" = {
-                  mountpoint = "/home";
-                };
-                "@log" = {
-                  mountpoint = "/var/log";
-                };
-              };
-              extraArgs = [
-                "-L"
-                "nixos-root"
-              ];
-              mountOptions = [
-                "compress=zstd"
-                "noatime"
-              ];
-            };
-          };
-
-        };
-      };
-    };
-  };
-}

hosts/Nixbook/hardware-configuration.nix

@@ -1,8 +1,6 @@
 { config
 , lib
-, pkgs
 , modulesPath
-, inputs
 , ...
 }: