refactor: replace WiFi service with declarative NetworkManager

- Remove unnecessary systemd.services.workshop-wifi-setup service
- Remove environment.etc."NetworkManager/workshop-wifi.env" file
- Add declarative networking.networkmanager.ensureProfiles configuration
- Remove redundant WiFi packages (wpa_supplicant, wirelesstools, iw)
- Update documentation to reflect automatic WiFi connection
- Clean up bash script references to old services

This simplifies the configuration and makes WiFi connection automatic on boot.

flake.nix

@@ -19,32 +19,13 @@
       system = "x86_64-linux";
       pkgs = nixpkgs.legacyPackages.${system};
 
-      # Server names for cloud connections
-      cloudServerNames = [
-        "hopper"
-        "curie"
-        "lovelace"
-        "noether"
-        "hamilton"
-        "franklin"
-        "johnson"
-        "clarke"
-        "goldberg"
-        "liskov"
-        "wing"
-        "rosen"
-        "shaw"
-        "karp"
-        "rich"
-      ];
-
       # Common configuration
       commonConfig =
         {
           isLiveIso ? false,
         }:
         import ./common.nix {
-          inherit pkgs cloudServerNames isLiveIso;
+          inherit pkgs isLiveIso;
         };
     in
     {