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.

pezkuwi/node/core/approval-voting/src/tests.rs

@@ -50,8 +50,8 @@ use std::{cmp::max, time::Duration};
 
 use assert_matches::assert_matches;
 use parking_lot::Mutex;
-use sp_keyring::sr25519::Keyring as Sr25519Keyring;
-use sp_keystore::Keystore;
+use pezsp_keyring::sr25519::Keyring as Sr25519Keyring;
+use pezsp_keystore::Keystore;
 use std::{
 	pin::Pin,
 	sync::{
@@ -540,12 +540,12 @@ fn test_harness<T: Future<Output = VirtualOverseer>>(
 	config: HarnessConfig,
 	test: impl FnOnce(TestHarness) -> T,
 ) {
-	sp_tracing::init_for_tests();
+	pezsp_tracing::init_for_tests();
 
 	let HarnessConfig { sync_oracle, sync_oracle_handle, clock, backend, assignment_criteria } =
 		config;
 
-	let pool = sp_core::testing::TaskExecutor::new();
+	let pool = pezsp_core::testing::TaskExecutor::new();
 	let (mut context, virtual_overseer) =
 		pezkuwi_node_subsystem_test_helpers::make_subsystem_context(pool.clone());