feat: Rebrand Polkadot/Substrate references to PezkuwiChain

This commit systematically rebrands various references from Parity Technologies'
Polkadot/Substrate ecosystem to PezkuwiChain within the kurdistan-sdk.

Key changes include:
- Updated external repository URLs (zombienet-sdk, parity-db, parity-scale-codec, wasm-instrument) to point to pezkuwichain forks.
- Modified internal documentation and code comments to reflect PezkuwiChain naming and structure.
- Replaced direct references to  with  or specific paths within the  for XCM, Pezkuwi, and other modules.
- Cleaned up deprecated  issue and PR references in various  and  files, particularly in  and  modules.
- Adjusted image and logo URLs in documentation to point to PezkuwiChain assets.
- Removed or rephrased comments related to external Polkadot/Substrate PRs and issues.

This is a significant step towards fully customizing the SDK for the PezkuwiChain ecosystem.

bridges/snowbridge/scripts/benchmark.sh

@@ -1,7 +1,7 @@
 #!/usr/bin/env bash
 
 # Example command for updating pallet benchmarking
-pushd ../cumulus
+pushd ../pezcumulus
 cargo run --release --bin pezkuwi-teyrchain \
 --features runtime-benchmarks \
 -- \

bridges/snowbridge/scripts/contribute-upstream.sh

@@ -66,7 +66,7 @@ cargo check -p snowbridge-pallet-system --features runtime-benchmarks
 cargo check -p snowbridge-pallet-system --features try-runtime
 
 # we're removing lock file after all checks are done. Otherwise we may use different
-# Substrate/Pezkuwi/Cumulus commits and our checks will fail
+# Bizinikiwi/Pezkuwi/Pezcumulus commits and our checks will fail
 rm -f $SNOWBRIDGE_FOLDER/Cargo.toml
 rm -f $SNOWBRIDGE_FOLDER/Cargo.lock