Add explicit bypass parameter handling

Plugins can mark a `BoolParam` with `.is_bypass()`. Hosts can then link
use that parameter directly in their own UI.

README.md

@@ -66,6 +66,9 @@ for download links.
     `Params` object and annotating them with `#[persist = "key"]`.
   - Group your parameters into logical groups by nesting `Params` objects using
     the `#[nested = "Group Name"]`attribute.
+  - When needed, you can also provide your own implementation for the `Params`
+    trait to enable dynamically generated parameters and arrays of if mostly
+    identical parameter objects.
 - Stateful. Behaves mostly like JUCE, just without all of the boilerplate.
 - Does not make any assumptions on how you want to process audio, but does come
   with utilities and adapters to help with common access patterns.