Custom furnace entity can't be smelted text

[CaitSith2]

TL;DR

Custom furnace prototype "can't smelt" localized text

What ?

A way to specify custom localized "can't be smelted" text for a given furnace prototype, for example, a crusher could say "<item> can't be crushed", or for an incinerator, "<item> can't be incinerated.", or for an air filtering machine, "<item> can't be used as an air filter."

Why ?

In the cases of various entities that are implemented as furnaces, it doesn't make sense in every case to say "<localised_item_name> can't be smelted".

[boskid]

That makes a lot of sense. Added for 1.1.89.

Value to provide will be just a `string` which is used as a LocalisedString key. __1__ parameter is the localised name of the item that a player tries to insert to the source stack

Modding:
- Added FurnacePrototype::cant_insert_at_source_message_key. (108146)

[curiosity]

This is a duplicate of viewtopic.php?f=28&t=2264, actually.