cumulus: add asset-hub-rococo runtime based on asset-hub-kusama and add asset-bridging support to it (#1215)

This commit adds Rococo Asset Hub dedicated runtime so we can test new
features here, before merging them in Kusama Asset Hub.
Also adds one such feature: asset transfer over bridge (Rococo AssetHub
<> Wococo AssetHub)

- clone `asset-hub-kusama-runtime` -> `asset-hub-rococo-runtime`
- make it use Rococo primitives, names, assets, constants, etc
- add asset-transfer-over-bridge support to Rococo AssetHub <> Wococo
AssetHub

Fixes #1128

---------

Co-authored-by: Branislav Kontur <bkontur@gmail.com>
Co-authored-by: joe petrowski <25483142+joepetrowski@users.noreply.github.com>
Co-authored-by: Francisco Aguirre <franciscoaguirreperez@gmail.com>

cumulus/pallets/xcmp-queue/src/lib.rs

@@ -35,6 +35,8 @@ mod tests;
 
 #[cfg(feature = "runtime-benchmarks")]
 mod benchmarking;
+#[cfg(feature = "bridging")]
+pub mod bridging;
 pub mod weights;
 pub use weights::WeightInfo;
 
@@ -947,6 +949,24 @@ impl<T: Config> Pallet<T> {
 			}
 		});
 	}
+
+	#[cfg(feature = "bridging")]
+	fn is_inbound_channel_suspended(sender: ParaId) -> bool {
+		<InboundXcmpStatus<T>>::get()
+			.iter()
+			.find(|c| c.sender == sender)
+			.map(|c| c.state == InboundState::Suspended)
+			.unwrap_or(false)
+	}
+
+	#[cfg(feature = "bridging")]
+	/// Returns tuple of `OutboundState` and number of queued pages.
+	fn outbound_channel_state(target: ParaId) -> Option<(OutboundState, u16)> {
+		<OutboundXcmpStatus<T>>::get().iter().find(|c| c.recipient == target).map(|c| {
+			let queued_pages = c.last_index.saturating_sub(c.first_index);
+			(c.state, queued_pages)
+		})
+	}
 }
 
 impl<T: Config> XcmpMessageHandler for Pallet<T> {