Complete rebrand: Polkadot→Pezkuwi, Substrate→Bizinikiwi

- Replace PolkadotConfig with PezkuwiConfig
- Replace SubstrateConfig with BizinikiwConfig
- Rename config module files (polkadot.rs→pezkuwi.rs, substrate.rs→bizinikiwi.rs)
- Update all documentation and examples
- All 165 files updated, cargo check passes

subxt/examples/setup_client_custom_rpc.rs

@@ -5,7 +5,7 @@ use std::{
 	sync::{Arc, Mutex},
 };
 use pezkuwi_subxt::{
-	OnlineClient, PolkadotConfig,
+	OnlineClient, PezkuwiConfig,
 	backend::rpc::{RawRpcFuture, RawRpcSubscription, RawValue, RpcClient, RpcClientT},
 };
 
@@ -73,7 +73,7 @@ async fn main() -> Result<(), Box<dyn std::error::Error>> {
 	// Pass this into our OnlineClient to instantiate it. This will lead to some
 	// RPC calls being made to fetch chain details/metadata, which will immediately
 	// fail..
-	let _ = OnlineClient::<PolkadotConfig>::from_rpc_client(rpc_client).await;
+	let _ = OnlineClient::<PezkuwiConfig>::from_rpc_client(rpc_client).await;
 
 	// But, we can see that the calls were made via our custom RPC client:
 	println!("Log of calls made:\n\n{}", log.lock().unwrap().as_str());