feat(wisdom): add vscode editor module

Add a new module for Visual Studio Code configuration including
default extensions (nix-ide, markdown-all-in-one, prettier) and
nixd/nixfmt settings. Enable vscode on 14900k, t2mbp, and uConsole
hosts with additional extensions.

Also clean up unfree predicate logic in ideapad configuration.

modules/hosts/14900k/home.nix

@@ -22,6 +22,14 @@
               spotify.openDiscoveryFirewall = true;
               pokeclicker.enable = true;
             };
+
+            editors.vscode = {
+              enable = true;
+              extensions = with pkgs.vscode-extensions; [
+                alefragnani.project-manager
+                johnpapa.vscode-peacock
+              ];
+            };
           };
         }
       ];