feat!: separate bindings and allow for custom bindings.

[VisualBean]

This PR moves Bindings into their own package (LEGO.AsyncAPI.Bindings)

BREAKING CHANGE: Moves bindings support to their own package.

For Writing, the support is the same, simply add the binding where applicable.
For Reading support has changed, as they arent implicitly added.

Binding support must be added explicitly to the reader through the settings.
A static helper has been made, to make this slightly easier, however.

var settings = new AsyncApiReaderSettings();
settings.Bindings.AddRange(BindingsCollection.All);
var reader = new AsyncApiStringReader(settings);

[dpwdec]

Nice work man! I guess I will act as a “QA” for this when I integrate it into the AWS bindings work. As ever appreciate you getting so much done on this so quickly! 🙏