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/zombienet/examples/small_network.toml

@@ -0,0 +1,25 @@
+[relaychain]
+default_image = "pezkuwichain/pezkuwi:latest"
+default_command = "pezkuwi"
+chain = "pezkuwichain-local"
+
+[[relaychain.nodes]]
+name = "alice"
+validator = true
+
+[[relaychain.nodes]]
+name = "bob"
+validator = true
+
+[[teyrchains]]
+id = 2000
+cumulus_based = true
+chain = "asset-hub-pezkuwichain-local"
+
+# run charlie as teyrchain collator
+[[teyrchains.collators]]
+name = "charlie"
+validator = true
+image = "pezkuwichain/pezkuwi-teyrchain:latest"
+command = "pezkuwi-teyrchain"
+args = ["--force-authoring"]