Adds Snowbridge to Rococo runtime (#2522)

# Description

Adds Snowbridge to the Rococo bridge hub runtime. Includes config
changes required in Rococo asset hub.

---------

Co-authored-by: Alistair Singh <alistair.singh7@gmail.com>
Co-authored-by: ron <yrong1997@gmail.com>
Co-authored-by: Vincent Geddes <vincent.geddes@hey.com>
Co-authored-by: claravanstaden <Cats 4 life!>

bridges/snowbridge/parachain/pallets/system/runtime-api/Cargo.toml

@@ -0,0 +1,32 @@
+[package]
+name = "snowbridge-system-runtime-api"
+description = "Snowbridge System Runtime API"
+version = "0.1.0"
+edition = "2021"
+authors = ["Snowfork <contact@snowfork.com>"]
+repository = "https://github.com/Snowfork/snowbridge"
+license = "Apache-2.0"
+
+[package.metadata.docs.rs]
+targets = ["x86_64-unknown-linux-gnu"]
+
+[dependencies]
+codec = { package = "parity-scale-codec", version = "3.6.1", default-features = false, features = [
+	"derive",
+] }
+sp-core = { path = "../../../../../../substrate/primitives/core", default-features = false }
+sp-std = { path = "../../../../../../substrate/primitives/std", default-features = false }
+sp-api = { path = "../../../../../../substrate/primitives/api", default-features = false }
+xcm = { package = "staging-xcm", path = "../../../../../../polkadot/xcm", default-features = false }
+snowbridge-core = { path = "../../../primitives/core", default-features = false }
+
+[features]
+default = ["std"]
+std = [
+	"codec/std",
+	"snowbridge-core/std",
+	"sp-api/std",
+	"sp-core/std",
+	"sp-std/std",
+	"xcm/std",
+]

bridges/snowbridge/parachain/pallets/system/runtime-api/src/lib.rs

@@ -0,0 +1,13 @@
+// SPDX-License-Identifier: Apache-2.0
+// SPDX-FileCopyrightText: 2023 Snowfork <hello@snowfork.com>
+#![cfg_attr(not(feature = "std"), no_std)]
+
+use snowbridge_core::AgentId;
+use xcm::VersionedMultiLocation;
+
+sp_api::decl_runtime_apis! {
+	pub trait ControlApi
+	{
+		fn agent_id(location: VersionedMultiLocation) -> Option<AgentId>;
+	}
+}