Legacy Modifier Recipe Format

[KnightMiner]

Need information in https://slimeknights.github.io/docs/json/recipes/modifiers/ on legacy formats for modifier recipes, notably including the modifier match setup used to setup modifier requirements and the output count that used to be supported. If the changes are too drastic, may be wroth splitting legacy formats to their own page.

Legacy JSON format for the salvage recipes would also be beneficial, from back when items were included.

Once both updates are made, redirect the pages on the old wiki to the new pages.