Forges are *substitutes* for each other, down to the individual charge

### Describe the bug


60kJ = ~62.4g of charcoal??? This is a value of about 1MJ/kg.

Wood contains about 16-18MJ/kg. Charcoal and coal contain more (it varies but it's not off by an entire 10x!!).

For an even worse comparison, we can do propane. Propane has an energy density of about 25MJ/L, and one unit of propane is 1mL. So that's 60mL, or in other words: **60kJ electricity = ~1.5MJ of propane.**

This is why:
https://github.com/CleverRaven/Cataclysm-DDA/blob/9020c00c9be57e2d0b21f023bf95482de327e481/data/json/items/tool/metalworking.json#L70

All the forges are *substitutes*. They should not be substitutes.

### Attach save file

N/A

### Steps to reproduce

Open the crafting menu

### Expected behavior

"sub" should be removed from all forges that aren't actual duplicates (i.e. mounted and non-mounted electric forge).

A new requirements set should be made, containing all the previous forges.

The requirements set should have the forges in some proportion which makes energy sense (**not** 1 unit of charcoal forge = 1 unit of electric forge)

### Screenshots

_No response_

### Versions and configuration

9020c00c9be57e2d0b21f023bf95482de327e481

### Additional context

_No response_

Start with data/json/items/tool/metalworking.json at the linked forge requirements and inspect how the crafting menu interprets the "sub" entries. Define a separate requirements set containing the forges, using energy-consistent proportions rather than one-for-one substitution. Reproduce through the crafting menu and verify mounted and non-mounted electric forges remain valid duplicates while other forge types are not substitutes.

Written by the indexing model from the issue text.