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.

pezcumulus/docker/scripts/build_pezkuwi.sh

@@ -0,0 +1,23 @@
+#!/usr/bin/env bash
+
+set -e
+
+cumulus_repo=$(cd "$(dirname "$0")" && git rev-parse --show-toplevel)
+pezkuwi_repo=$(dirname "$cumulus_repo")/pezkuwi
+if [ ! -d "$pezkuwi_repo/.git" ]; then
+    echo "please clone pezkuwi in parallel to this repo:"
+    echo "  (cd .. && git clone git@github.com:paritytech/pezkuwi.git)"
+    exit 1
+fi
+
+if [ -z "$BRANCH" ]; then
+    BRANCH=pezcumulus-branch
+fi
+
+cd "$pezkuwi_repo"
+git fetch
+git checkout "$BRANCH"
+time docker build \
+    -f ./docker/Dockerfile \
+    --build-arg PROFILE=release \
+    -t pezkuwi:"$BRANCH" .