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/constants_static.rs

@@ -1,16 +1,16 @@
 #![allow(missing_docs)]
-use pezkuwi_subxt::{OnlineClient, PolkadotConfig};
+use pezkuwi_subxt::{OnlineClient, PezkuwiConfig};
 
-#[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>> {
 	// Create a client to use:
-	let api = OnlineClient::<PolkadotConfig>::new().await?;
+	let api = OnlineClient::<PezkuwiConfig>::new().await?;
 
 	// A query to obtain some constant:
-	let constant_query = polkadot::constants().system().block_length();
+	let constant_query = pezkuwi::constants().system().block_length();
 
 	// Obtain the value:
 	let value = api.constants().at(&constant_query)?;