Disable Opencode; update flake.lock and librewolf

- Opencode module disabled in desktop, laptop, and default host configs
- Updated flake.lock revisions for firefox‑addons, home‑manager, nixpkgs
  and stylix
- Librewolf now uses pkgs.librewolf (source) instead of the binary
  package

modules/home/librewolf/default.nix

@@ -8,7 +8,7 @@
 
   config.programs.librewolf = lib.mkIf config.librewolf.enable {
     enable = true;
-    package = pkgs.librewolf-bin;
+    package = pkgs.librewolf;
     # nativeMessagingHosts = [pkgs.firefoxpwa];
     languagePacks = [
       "pl"