chore(settings)!: make reader bindings IEnumerable to allow for simpl…

…er usage

```csharp
new Settings
{
  Bindings = BindingCollection.All,
};
```

BREAKING CHANGE: changes how bindings are applied.

src/LEGO.AsyncAPI.Readers/AsyncApiReaderSettings.cs

@@ -42,7 +42,7 @@ public Dictionary<string, Func<AsyncApiAny, IAsyncApiExtension>>
         { get; set; } =
             new Dictionary<string, Func<AsyncApiAny, IAsyncApiExtension>>();
 
-        public List<IBindingParser<IBinding>>
+        public IEnumerable<IBindingParser<IBinding>>
            Bindings
         { get; set; } =
            new List<IBindingParser<IBinding>>();