Enhanced asset download support

[shartte]

• Add support for copying Assets from an existing Launcher
• Add support for writing the Neoform asset JSON reference format
• Add support for specifying the asset download directory

Merge after https://github.com/neoforged/NeoFormRuntime/pull/27

[neoforged-pr-publishing[bot]]

• [x] Publish PR to GitHub Packages

Last commit published: 6f59f52f4d0fa8ccb7a231f97311210a80a20239.

PR Publishing

### The artifacts published by this PR: - :package: [`net.neoforged:neoform-runtime:0.1.84-pr-25-asset-enhancements`](https://github.com/neoforged/NeoFormRuntime/packages/2194136) ### Repository Declaration In order to use the artifacts published by the PR, add the following repository to your buildscript: ```gradle repositories { maven { name 'Maven for PR #25' // https://github.com/neoforged/NeoFormRuntime/pull/25 url 'https://prmaven.neoforged.net/NeoFormRuntime/pr25' content { includeModule('net.neoforged', 'neoform-runtime') } } } ```