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

metadata/src/from/legacy/tests.rs

@@ -35,7 +35,7 @@ fn legacy_kusama_metadata(version: u8) -> (u64, RuntimeMetadata) {
 /// Load our kusama types.
 /// TODO: This is WRONG at the moment; change to point to kusama types when they exist:
 fn kusama_types() -> scale_info_legacy::ChainTypeRegistry {
-	frame_decode::legacy_types::polkadot::relay_chain()
+	frame_decode::legacy_types::pezkuwi::relay_chain()
 }
 
 /// Sanitizing paths changes things between old and new, so disable this in tests by default

metadata/src/from/v14.rs

@@ -229,7 +229,7 @@ fn generate_outer_error_enum_type(
 
 /// The type IDs extracted from the metadata that represent the
 /// generic type parameters passed to the `UncheckedExtrinsic` from
-/// the substrate-based chain.
+/// the bizinikiwi-based chain.
 #[derive(Clone, Copy)]
 struct MissingExtrinsicTypeIds {
 	address: u32,

metadata/src/lib.rs

@@ -2,7 +2,7 @@
 // This file is dual-licensed as Apache-2.0 or GPL-3.0.
 // see LICENSE for license details.
 
-//! A representation of the metadata provided by a substrate based node.
+//! A representation of the metadata provided by a bizinikiwi based node.
 //! This representation is optimized to be used by Subxt and related crates,
 //! and is independent of the different versions of metadata that can be
 //! provided from a node.