refactor: cleanup configs, unify session handling

- flake.nix:
  - Close braces formatting for `allowUnfree`
  - Remove per-user `custom.sessionType` modules
- home-manager:
  - home.nix: remove unused apps (bambu-studio, hydralauncher, keymapp, etc.)
    - drop librespot service
    - add waydroid
    - fix kitty font_family spacing
  - gnome: add gnome-tweaks and appindicator extension
  - vim: update nixvim module import path
  - zsh: drop sessionType option and conditional aliases
    - hardcode wl-copy/wl-paste as pbcopy/pbpaste
- hyprland: style fixes in braces, spacing, keybind comments
- hosts/Nixstation:
  - remove gnome-session and redundant tweaks
  - remove env vars NIXOS_HOST / NIXOS_DE
  - enable virtualization (libvirtd, spiceUSBRedirection, vmware.host=false)
- hardware-configuration: reformat fileSystems definitions
- common/nvidia:
  - remove explicit kernelPackages override
  - ensure xserver.enable=true and GNOME/GDM config intact
- users/thiago: reorder and regroup extraGroups list

home-manager/hyprland/default.nix

@@ -1,4 +1,5 @@
-{lib, ...}: {
+{ lib, ... }:
+{
   home.sessionVariables = {
     fileManager = "thunar";
     menu = "fuzzel --show drun";
@@ -22,7 +23,7 @@
         sha256 = "0gxa45qigjcjb12v243jv37nji5dax6rn5y6l823f0a2s2hfkqm5";
       };
       force = true;
-     };
+    };
   };
   services.hyprpaper.enable = true;
   services.hyprpaper.settings = {
@@ -34,7 +35,7 @@
     enable = true;
     settings = {
       "$mod" = "SUPER";
-      layerrule =[
+      layerrule = [
         "ignorezero, waybar"
         "blur, waybar"
       ];
@@ -80,9 +81,8 @@
         "$mod, mouse_up, workspace, e-1"
       ];
 
-      
       bindm = [
-        "$mod, mouse:272, movewindow"   # Hold $mod and left mouse button to move window
+        "$mod, mouse:272, movewindow" # Hold $mod and left mouse button to move window
         "$mod, mouse:273, resizewindow" # Hold $mod and right mouse button to resize window
       ];