Make Platform Impl SupportedConfigs Clone (#954)

* Make SupportedInput/OutputConfigs Cloneable

* Fix Null Host

Author: GamingLiamStudios

src/host/null/mod.rs

@@ -19,7 +19,9 @@ pub struct Host;
 #[derive(Debug, Clone, PartialEq, Eq, Hash)]
 pub struct Stream;
 
+#[derive(Clone)]
 pub struct SupportedInputConfigs;
+#[derive(Clone)]
 pub struct SupportedOutputConfigs;
 
 impl Host {

src/platform/mod.rs

@@ -69,10 +69,12 @@ macro_rules! impl_platform_host {
 
         /// The `SupportedInputConfigs` iterator associated with the platform's dynamically
         /// dispatched [`Host`] type.
+        #[derive(Clone)]
         pub struct SupportedInputConfigs(SupportedInputConfigsInner);
 
         /// The `SupportedOutputConfigs` iterator associated with the platform's dynamically
         /// dispatched [`Host`] type.
+        #[derive(Clone)]
         pub struct SupportedOutputConfigs(SupportedOutputConfigsInner);
 
         /// Unique identifier for available hosts on the platform.
@@ -117,13 +119,15 @@ macro_rules! impl_platform_host {
             )*
         }
 
+        #[derive(Clone)]
         enum SupportedInputConfigsInner {
             $(
                 $(#[cfg($feat)])?
                 $HostVariant(crate::host::$host_mod::SupportedInputConfigs),
             )*
         }
 
+        #[derive(Clone)]
         enum SupportedOutputConfigsInner {
             $(
                 $(#[cfg($feat)])?