add some utility From<Interned<T>> impls

crates/fayalite/src/intern.rs

@@ -764,6 +764,24 @@ where
     }
 }
 
+impl<T: 'static + Clone + Send + Sync, C: InternContext> From<Interned<[T], C>> for Vec<T> {
+    fn from(value: Interned<[T], C>) -> Self {
+        Vec::from(&*value.guard())
+    }
+}
+
+impl<T: 'static + Clone + Send + Sync, C: InternContext> From<Interned<[T], C>> for Box<[T]> {
+    fn from(value: Interned<[T], C>) -> Self {
+        Box::from(&*value.guard())
+    }
+}
+
+impl<C: InternContext> From<Interned<str, C>> for String {
+    fn from(value: Interned<str, C>) -> Self {
+        String::from(&*value.guard())
+    }
+}
+
 impl<I, C: InternContext<AllContextsAreIdentical = ConstBool<true>> + Default> Default
     for Interned<[I], C>
 where