fix(Lua): LocalUnrealParam and RemoteUnrealParam no longer tries to handle unregistered indexing

Previously, it wouldn't distinguish between Get/Set, and any random indexing operation, often triggering Lua pushers, which themselves will generate a very confusing error message.

This commit removes the Index and NewIndex metamethods from these types, which means Lua will give a standard error when improperly indexing into them without first calling `Get`, for example: `attempt to call a RemoteUnrealParam value (method 'GetFullName')`

Author: UE4SS

UE4SS/include/LuaType/LuaUObject.hpp

@@ -834,15 +834,6 @@ No overload found for function 'UObject.ProcessConsoleExec'.
       private:
         auto static setup_metamethods(LuaMadeSimple::Type::BaseObject& base_object) -> void
         {
-            base_object.get_metamethods().create(LuaMadeSimple::Lua::MetaMethod::Index, [](const LuaMadeSimple::Lua& lua) -> int {
-                prepare_to_handle(Operation::Get, lua);
-                return 1;
-            });
-
-            base_object.get_metamethods().create(LuaMadeSimple::Lua::MetaMethod::NewIndex, [](const LuaMadeSimple::Lua& lua) -> int {
-                prepare_to_handle(Operation::Set, lua);
-                return 0;
-            });
         }
 
         auto static setup_member_functions(LuaMadeSimple::Lua::Table& table) -> void

UE4SS/src/LuaType/LuaUObject.cpp

@@ -2253,15 +2253,6 @@ No overload found for function 'IsA'.
 
     auto RemoteUnrealParam::setup_metamethods(BaseObject& base_object) -> void
     {
-        base_object.get_metamethods().create(LuaMadeSimple::Lua::MetaMethod::Index, [](const LuaMadeSimple::Lua& lua) -> int {
-            prepare_to_handle(Operation::Get, lua);
-            return 1;
-        });
-
-        base_object.get_metamethods().create(LuaMadeSimple::Lua::MetaMethod::NewIndex, [](const LuaMadeSimple::Lua& lua) -> int {
-            prepare_to_handle(Operation::Set, lua);
-            return 0;
-        });
     }
 
     auto RemoteUnrealParam::setup_member_functions(LuaMadeSimple::Lua::Table& table) -> void

assets/Changelog.md

@@ -346,6 +346,8 @@ Improved performance of script hooks created with `RegisterHook`, and
 
 Types with `get` or `Get` functions now have both variants. ([UE4SS #877](https://github.com/UE4SS-RE/RE-UE4SS/pull/877))
 
+Improved error messages when improperly indexing into `LocalUnrealParam`, and `RemoteUnrealParam` without first calling `Get`. ([UE4SS #1154](https://github.com/UE4SS-RE/RE-UE4SS/pull/1154))
+
 #### UEHelpers [UE4SS #650](https://github.com/UE4SS-RE/RE-UE4SS/pull/650) 
 - Increased version to 3