Trading Outpost now has half buy-only and half sell-only pallets (#25955)

* Added new Buy & Sell specific cargo pallets

* Remapped trading outpost with new pallets, tweaked texture

* Removed debug message

* Fixed/Compacted conditional checking to let old pallets still work for backwards compatability

* Update Content.Server/Cargo/Components/CargoPalletComponent.cs

Alright, updating all the references to it.

Co-authored-by: Tayrtahn <tayrtahn@gmail.com>

* Changed textures, changed to enum instead of string for pallet type check

* Few minor code tweaks/formatting fixes

* Missed the prototype change

* Update Content.Server/Cargo/Components/CargoPalletComponent.cs

* Update Content.Server/Cargo/Systems/CargoSystem.Shuttle.cs

---------

Co-authored-by: Tayrtahn <tayrtahn@gmail.com>
Co-authored-by: metalgearsloth <31366439+metalgearsloth@users.noreply.github.com>

Content.Server/Cargo/Systems/CargoSystem.Orders.cs

@@ -205,7 +205,7 @@ namespace Content.Server.Cargo.Systems
             // Try to fulfill from any station where possible, if the pad is not occupied.
             foreach (var trade in _listEnts)
             {
-                var tradePads = GetCargoPallets(trade);
+                var tradePads = GetCargoPallets(trade, BuySellType.Buy);
                 _random.Shuffle(tradePads);
 
                 var freePads = GetFreeCargoPallets(trade, tradePads);