feat: Vendor pezkuwi-subxt and pezkuwi-zombienet-sdk into monorepo

- Add pezkuwi-subxt crates to vendor/pezkuwi-subxt
- Add pezkuwi-zombienet-sdk crates to vendor/pezkuwi-zombienet-sdk
- Convert git dependencies to path dependencies
- Add vendor crates to workspace members
- Remove test/example crates from vendor (not needed for SDK)
- Fix feature propagation issues detected by zepter
- Fix workspace inheritance for internal dependencies
- All 606 crates now in workspace
- All 6919 internal dependency links verified correct
- No git dependencies remaining

vendor/pezkuwi-subxt/lightclient/src/shared_client.rs

@@ -0,0 +1,42 @@
+// Copyright 2019-2025 Parity Technologies (UK) Ltd.
+// This file is dual-licensed as Apache-2.0 or GPL-3.0.
+// see LICENSE for license details.
+
+use smoldot_light as sl;
+use std::sync::{Arc, Mutex};
+
+/// This wraps [`smoldot_light::Client`] so that it can be cloned and shared.
+#[derive(Clone)]
+pub struct SharedClient<TPlat: sl::platform::PlatformRef, TChain = ()> {
+	client: Arc<Mutex<sl::Client<TPlat, TChain>>>,
+}
+
+impl<TPlat: sl::platform::PlatformRef, TChain> From<sl::Client<TPlat, TChain>>
+	for SharedClient<TPlat, TChain>
+{
+	fn from(client: sl::Client<TPlat, TChain>) -> Self {
+		SharedClient { client: Arc::new(Mutex::new(client)) }
+	}
+}
+
+impl<TPlat: sl::platform::PlatformRef, TChain> SharedClient<TPlat, TChain> {
+	/// Delegates to [`smoldot_light::Client::json_rpc_request()`].
+	pub(crate) fn json_rpc_request(
+		&self,
+		json_rpc_request: impl Into<String>,
+		chain_id: sl::ChainId,
+	) -> Result<(), sl::HandleRpcError> {
+		self.client
+			.lock()
+			.expect("mutex should not be poisoned")
+			.json_rpc_request(json_rpc_request, chain_id)
+	}
+
+	/// Delegates to [`smoldot_light::Client::add_chain()`].
+	pub(crate) fn add_chain(
+		&self,
+		config: sl::AddChainConfig<'_, TChain, impl Iterator<Item = sl::ChainId>>,
+	) -> Result<sl::AddChainSuccess<TPlat>, sl::AddChainError> {
+		self.client.lock().expect("mutex should not be poisoned").add_chain(config)
+	}
+}