Rework ps-inventory support

PS-Inv used to be exactly the same as QB-Inv so alot of the function calls were shared

This separates them and makes it easier to make changes to support their inventory

Also unified the calls for server side functions into single functions instead of having separate per inventory

Also moves:
- `invImg()` to inventories.lua
- `registerStash()` to stashcontrol.lua

shared/inventories.lua

@@ -206,4 +206,55 @@ function isInventoryOpen()
         return LocalPlayer.state.inv_busy
 
     end
+end
+
+-------------------------------------------------------------
+-- Item Image Retrieval
+-------------------------------------------------------------
+
+--- Retrieves the NUI link for an item's image from the active inventory system.
+---
+--- @param item string The item name.
+--- @return string string A `nui://` link to the item's image, or an empty string if not found.
+---
+--- @usage
+--- ```lua
+--- local imageLink = invImg("health_potion")
+--- if imageLink ~= "" then print(imageLink) end
+--- ```
+function invImg(item)
+    local imgLink = ""
+    if item ~= "" and Items[item] then
+        if isStarted(OXInv) then
+            imgLink = "nui://"..OXInv.."/web/images/"..(Items[item].image or "")
+
+        elseif isStarted(QSInv) then
+            imgLink = "nui://"..QSInv.."/html/images/"..(Items[item].image or "")
+
+        elseif isStarted(CoreInv) then
+            imgLink = "nui://"..CoreInv.."/html/img/"..(Items[item].image or "")
+
+        elseif isStarted(CodeMInv) then
+            imgLink = "nui://"..CodeMInv.."/html/itemimages/"..(Items[item].image or "")
+
+        elseif isStarted(OrigenInv) then
+            imgLink = "nui://"..OrigenInv.."/html/img/"..(Items[item].image or "")
+
+        elseif isStarted(QBInv) then
+            imgLink = "nui://"..QBInv.."/html/images/"..(Items[item].image or "")
+
+        elseif isStarted(PSInv) then
+            imgLink = "nui://"..PSInv.."/html/images/"..(Items[item].image or "")
+
+        elseif isStarted(TgiannInv) then
+            imgLink = "nui://inventory_images/images/"..(Items[item].image or "")
+
+        elseif isStarted(RSGInv) then
+            imgLink = "nui://"..RSGInv.."/html/images/"..(Items[item].image or "")
+
+        else
+            print("^4ERROR^7: ^2No Inventory detected for invImg - Check starter.lua")
+        end
+    end
+    return imgLink
 end