Add simple getter for configs by mod and the loaded configs

[Technici4n]

Quite simple and useful, especially for alternative config screen implementations that have a different strategy. Requested by @Speiger in neoforged/NeoForge#1336.

Fixes neoforged/NeoForge#1336.

[neoforged-pr-publishing]

• Publish PR to GitHub Packages

Last commit published: 7a74eaa59419d67ed6ea7f2b75a4d68e179a169a.

PR Publishing

The artifacts published by this PR:

• 📦 net.neoforged.fancymodloader:loader:4.0.25-pr-185-get-mod-configs
• 📦 net.neoforged.fancymodloader:earlydisplay:4.0.25-pr-185-get-mod-configs
• 📦 net.neoforged.fancymodloader:junit-fml:4.0.25-pr-185-get-mod-configs

Repository Declaration

In order to use the artifacts published by the PR, add the following repository to your buildscript:

repositories {
    maven {
        name 'Maven for PR #185' // https://github.com/neoforged/FancyModLoader/pull/185
        url 'https://prmaven.neoforged.net/FancyModLoader/pr185'
        content {
            includeModule('net.neoforged.fancymodloader', 'loader')
            includeModule('net.neoforged.fancymodloader', 'earlydisplay')
            includeModule('net.neoforged.fancymodloader', 'junit-fml')
        }
    }
}

[Speiger]

@Technici4n why List.copyOf instead of Collections.unmodifiableList? (Wrap instead of copy i mean)
Just curious of the thought process here