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/testing/run-test.sh

@@ -33,13 +33,13 @@ if [ "$ZOMBIENET_DOCKER_PATHS" -eq 1 ]; then
     export PEZKUWI_TEYRCHAIN_BINARY=/usr/local/bin/pezkuwi-teyrchain
 
     export ZOMBIENET_BINARY=/usr/local/bin/zombie
-    export SUBSTRATE_RELAY_BINARY=/usr/local/bin/substrate-relay
+    export BIZINIKIWI_RELAY_BINARY=/usr/local/bin/bizinikiwi-relay
 else
     export PEZKUWI_BINARY=$PEZKUWI_SDK_PATH/target/release/pezkuwi
     export PEZKUWI_TEYRCHAIN_BINARY=$PEZKUWI_SDK_PATH/target/release/pezkuwi-teyrchain
 
     export ZOMBIENET_BINARY=~/local_bridge_testing/bin/zombienet
-    export SUBSTRATE_RELAY_BINARY=~/local_bridge_testing/bin/substrate-relay
+    export BIZINIKIWI_RELAY_BINARY=~/local_bridge_testing/bin/bizinikiwi-relay
 fi
 
 export TEST_DIR=`mktemp -d /tmp/bridges-tests-run-XXXXX`