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

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

@@ -0,0 +1,28 @@
+#![allow(missing_docs)]
+use subxt::{OnlineClient, config::PolkadotConfig};
+use pezkuwi_subxt_signer::sr25519::dev;
+
+#[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 client to use:
+    let api = OnlineClient::<PolkadotConfig>::new().await?;
+
+    // Create a runtime API payload that calls into
+    // `AccountNonceApi_account_nonce` function.
+    let account = dev::alice().public_key().into();
+    let runtime_api_call = polkadot::apis().account_nonce_api().account_nonce(account);
+
+    // Submit the call and get back a result.
+    let nonce = api
+        .runtime_api()
+        .at_latest()
+        .await?
+        .call(runtime_api_call)
+        .await;
+
+    println!("AccountNonceApi_account_nonce for Alice: {nonce:?}");
+    Ok(())
+}