fix: Fixes localization corner cases with OPL (#1050)

## Changes
- [X] Adds OPL convenience methods
    - `opl.Add(cliloc, value)` and `opl.Add(value)` - value as an integer or string works just like `opl.Add(cliloc, $"{value}")`
    - `opl.AddLocalized(cliloc, clilocValue)` - works the same as `opl.Add(cliloc, $"#{clilocValue}");`
- [X] Simplifies basic `list.Add()` situations
- [X] Changes cliloc as an argument so it works with custom IPropertyList implementations (HTML)
- [X] Fixes plants so they support the old localization and new (changed in 7.0.12.0+)
- [X] Exposes more methods to override for Item to make creating custom OPL possible.

## Important Notes
* Using a ternary as an argument, like this `opl.Add(number, showType ? $"{type}\t{value}" : $"{value}");` _will not use the correct string interpolation_. This means if you use a custom PropertyList (for HTML or some other purpose), the property list won't be localized properly.
* All localization values must be interpolated, even if they are literal strings, or integers. Example: `opl.Add(number, $"{"Charges"}\t{m_Charges}");` is correct. Using the following: `$"Charges\t{m_Charges}"` will not work for custom PropertyList implementations!

Projects/UOContent/Items/Skill Items/Tools/RunicSewingKit.cs

@@ -26,23 +26,24 @@ namespace Server.Items
 
         public override void AddNameProperty(IPropertyList list)
         {
-            var v = " ";
-
-            if (!CraftResources.IsStandard(Resource))
+            if (CraftResources.IsStandard(Resource))
             {
-                var num = CraftResources.GetLocalizationNumber(Resource);
-
-                if (num > 0)
-                {
-                    v = $"#{num}";
-                }
-                else
-                {
-                    v = CraftResources.GetName(Resource);
-                }
+                list.Add(1061119, " "); // ~1_LEATHER_TYPE~ runic sewing kit
+                return;
             }
 
-            list.Add(1061119, v); // ~1_LEATHER_TYPE~ runic sewing kit
+            var num = CraftResources.GetLocalizationNumber(Resource);
+
+            if (num > 0)
+            {
+                // ~1_LEATHER_TYPE~ runic sewing kit
+                list.Add(1061119, $"#{num}");
+            }
+            else
+            {
+                // ~1_LEATHER_TYPE~ runic sewing kit
+                list.Add(1061119, CraftResources.GetName(Resource));
+            }
         }
 
         public override void OnSingleClick(Mobile from)