Mapping egg configuration files

[devnote-dev]

Currently this is in place of the files field for the egg configuration object:

Pteroxide/pteroxide-models/src/application/egg.rs

Lines 33 to 37 in 19775e9

	/// Represents the inner configuration of an [`Egg`].
	#[derive(Clone, Debug, Deserialize, Eq, PartialEq, Serialize)]
	pub struct EggConfig {
	// FIXME: might not be able to implement this due to complexity
	// pub files: HashMap<String, EggConfigDescriptor>,

This is because the files object can contain nested objects containing string, number, boolean and object values – it's potentially recursive, and really hard to convey in Rust due to type unions not being a thing. One workaround could be a C-style union which is more like an object or named tuple with all the potential values, but implementation complexity may be a problem with that.