added overlay packages, added go overlay

needed go overlay for diffnav

home/packages/workstation.nix

@@ -18,7 +18,6 @@
     fh
     kubectl # kube config is deliberately not included
     kubectx
-    obsidian
     vscode
     yt-dlp
     weechat
@@ -29,5 +28,10 @@
     deadnix
     alejandra
     statix
+    gh
+    ghDashLatest
+    diffNavLatest
+  ] ++ lib.optionals isNixOS [
+    obsidian
   ];
 }