style(desktop): reformat nix code and simplify module logic

Refactor `modules/desktop/options.nix` to improve code readability through
consistent indentation and whitespace management. Simplified the
conditional logic for `home-manager.extraSpecialArgs` to remove
unnecessary complexity.

Clean up host configurations by removing commented-out code, removing
unnecessary whitespace, and flattening nested attribute sets into
single-line declarations where appropriate.

modules/hosts/t2mbp/home.nix

@@ -8,9 +8,7 @@
       chiasson.users.extraModules.olivier = [
         {
           chiasson.home = {
-            browsers = {
-              edge.enable = true;
-            };
+            browsers.edge.enable = true;
 
             apps = {
               discord.enable = true;
@@ -19,6 +17,5 @@
           };
         }
       ];
-
     };
 }