fix: Convert vendor/pezkuwi-subxt from submodule to regular directory

vendor/pezkuwi-subxt/subxt/examples/storage_fetch.rs

@@ -0,0 +1,32 @@
+#![allow(missing_docs)]
+use subxt::{OnlineClient, PolkadotConfig};
+use pezkuwi_subxt_signer::sr25519::dev;
+
+// Generate an interface that we can use from the node's metadata.
+#[subxt::subxt(runtime_metadata_path = "../artifacts/polkadot_metadata_small.scale")]
+pub mod polkadot {}
+
+#[tokio::main]
+async fn main() -> Result<(), Box<dyn std::error::Error>> {
+    // Create a new API client, configured to talk to Polkadot nodes.
+    let api = OnlineClient::<PolkadotConfig>::new().await?;
+    let account = dev::alice().public_key().into();
+
+    // Build a storage query to access account information.
+    let storage_query = polkadot::storage().system().account();
+
+    // Use that query to access a storage entry, fetch a result and decode the value.
+    // The static address knows that fetching requires a tuple of one value, an
+    // AccountId32.
+    let client_at = api.storage().at_latest().await?;
+    let account_info = client_at
+        .entry(storage_query)?
+        .fetch((account,))
+        .await?
+        .decode()?;
+
+    // The static address that we got from the subxt macro knows the expected input
+    // and return types, so it is decoded into a static type for us.
+    println!("Alice: {account_info:?}");
+    Ok(())
+}