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/subxt/examples/light_client_basic.rs

@@ -0,0 +1,47 @@
+#![allow(missing_docs)]
+use futures::StreamExt;
+use pezkuwi_subxt::{PezkuwiConfig, client::OnlineClient, lightclient::LightClient};
+
+// Generate an interface that we can use from the node's metadata.
+#[pezkuwi_subxt::subxt(runtime_metadata_path = "../artifacts/pezkuwi_metadata_small.scale")]
+pub mod pezkuwi {}
+
+const POLKADOT_SPEC: &str = include_str!("../../artifacts/demo_chain_specs/pezkuwi.json");
+const ASSET_HUB_SPEC: &str =
+	include_str!("../../artifacts/demo_chain_specs/pezkuwi_asset_hub.json");
+
+#[tokio::main]
+async fn main() -> Result<(), Box<dyn std::error::Error>> {
+	// The lightclient logs are informative:
+	tracing_subscriber::fmt::init();
+
+	// Instantiate a light client with the Pezkuwi relay chain,
+	// and connect it to Asset Hub, too.
+	let (lightclient, pezkuwi_rpc) = LightClient::relay_chain(POLKADOT_SPEC)?;
+	let asset_hub_rpc = lightclient.parachain(ASSET_HUB_SPEC)?;
+
+	// Create Subxt clients from these Smoldot backed RPC clients.
+	let pezkuwi_api = OnlineClient::<PezkuwiConfig>::from_rpc_client(pezkuwi_rpc).await?;
+	let asset_hub_api = OnlineClient::<PezkuwiConfig>::from_rpc_client(asset_hub_rpc).await?;
+
+	// Use them!
+	let pezkuwi_sub = pezkuwi_api
+		.blocks()
+		.subscribe_finalized()
+		.await?
+		.map(|block| ("Pezkuwi", block));
+	let parachain_sub = asset_hub_api
+		.blocks()
+		.subscribe_finalized()
+		.await?
+		.map(|block| ("AssetHub", block));
+
+	let mut stream_combinator = futures::stream::select(pezkuwi_sub, parachain_sub);
+
+	while let Some((chain, block)) = stream_combinator.next().await {
+		let block = block?;
+		println!("     Chain {:?} hash={:?}", chain, block.hash());
+	}
+
+	Ok(())
+}