Catalyst in alloying

[MiyaPixai]

Minecraft Version

1.18.2

Forge Version

40.2.2

Mantle Version

1.9.45

Tinkers' Construct Version

3.6.4.113

Problem description

It's not possible for alloy to either have two product, or keep one of the alloying ingredient intact during the process.
For example, requiring a high value material to unlock a recipe without needing to consume said material.

Suggested solution

Allow one of the ingredients of an alloying recipe to be a catalyst; required for, but not being consumed by, the process.

Alternatives considered

Apart from by-products, which aren't support by the alloying process, my current solution is to use the catalyst as a reusable cast in a casting table.
This makes the process mildly convoluted as the material needs to be re-melted to be used in the smeltery.

Additional context

My current use case requires a nether star to craft an end game Create ingot. The nether star isn't consumed by the process.

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