Removes Snowbridge parachain directory (#3186)

Removes the `bridges/snowbridge/parachain` directory and moves
everything up to under `snowbridge` directly. We are cleaning up our
local dev env after merging our crates into the polkadot-sdk.

---------

Co-authored-by: claravanstaden <Cats 4 life!>

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

@@ -0,0 +1,36 @@
+[package]
+name = "snowbridge-system-runtime-api"
+description = "Snowbridge System Runtime API"
+version = "0.0.0"
+authors = ["Snowfork <contact@snowfork.com>"]
+edition.workspace = true
+repository.workspace = true
+license = "Apache-2.0"
+categories = ["cryptography::cryptocurrencies"]
+
+[lints]
+workspace = true
+
+[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/pallets/system/runtime-api/README.md

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+# Ethereum System Runtime API
+
+Provides an API for looking up an agent ID on Ethereum.

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

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+// 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::VersionedLocation;
+
+sp_api::decl_runtime_apis! {
+	pub trait ControlApi
+	{
+		fn agent_id(location: VersionedLocation) -> Option<AgentId>;
+	}
+}