feat: user consent setting and retrieving (NOTE: does not affect recording yet)

src/option_ext.rs

@@ -0,0 +1,11 @@
+use extension_traits::extension;
+
+#[extension(pub trait OptionExt)]
+impl<S> Option<S> {
+    async fn map_async<M, Fut: Future<Output = M>, F: FnOnce(S) -> Fut>(self, f: F) -> Option<M> {
+        match self {
+            Some(s) => Some(f(s).await),
+            None => None,
+        }
+    }
+}