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_rpc_chainhead_backend.rs

@@ -4,7 +4,7 @@
 
 use futures::StreamExt;
 use pezkuwi_subxt::{
-	OnlineClient, PolkadotConfig,
+	OnlineClient, PezkuwiConfig,
 	backend::{
 		chain_head::{ChainHeadBackend, ChainHeadBackendBuilder},
 		rpc::RpcClient,
@@ -12,15 +12,15 @@ use pezkuwi_subxt::{
 };
 
 // Generate an interface that we can use from the node's metadata.
-#[pezkuwi_subxt::subxt(runtime_metadata_path = "../artifacts/polkadot_metadata_small.scale")]
-pub mod polkadot {}
+#[pezkuwi_subxt::subxt(runtime_metadata_path = "../artifacts/pezkuwi_metadata_small.scale")]
+pub mod pezkuwi {}
 
 #[tokio::main]
 async fn main() -> Result<(), Box<dyn std::error::Error>> {
 	tracing_subscriber::fmt::init();
 
 	let rpc = RpcClient::from_url("ws://localhost:9944".to_string()).await?;
-	let backend: ChainHeadBackend<PolkadotConfig> =
+	let backend: ChainHeadBackend<PezkuwiConfig> =
 		ChainHeadBackendBuilder::default().build_with_background_driver(rpc.clone());
 	let api = OnlineClient::from_backend(std::sync::Arc::new(backend)).await?;