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.

docs/mermaid/IA.mmd

@@ -6,7 +6,7 @@ flowchart TD
     devhub --> guides
 	devhub --> external_resources
 
-    pezkuwi_sdk --> substrate
+    pezkuwi_sdk --> bizinikiwi
     pezkuwi_sdk --> frame
     pezkuwi_sdk --> xcm
 	pezkuwi_sdk --> templates

docs/mermaid/bizinikiwi_client_runtime.mmd

@@ -1,5 +1,5 @@
 graph TB
-subgraph Substrate
+subgraph Bizinikiwi
 	direction LR
 	subgraph Node
 	end

docs/mermaid/bizinikiwi_simple.mmd

@@ -1,5 +1,5 @@
 graph TB
-subgraph Substrate
+subgraph Bizinikiwi
 	direction LR
 	subgraph Node
 	end

docs/mermaid/bizinikiwi_with_frame.mmd

@@ -1,5 +1,5 @@
 graph TB
-subgraph Substrate
+subgraph Bizinikiwi
 	direction LR
 	subgraph Node
 		Database

docs/mermaid/pezkuwi_sdk_teyrchain.mmd

@@ -7,5 +7,5 @@ flowchart LR
     FRAME -.-> TeyrChainRuntime
     PezkuwiSDK[Pezkuwi SDK Node Libraries] -.-> TeyrChainNode
 
-    CumulusC[Cumulus Node Libraries] -.-> TeyrChainNode
-    CumulusR[Cumulus Runtime Libraries] -.-> TeyrChainRuntime
+    CumulusC[Pezcumulus Node Libraries] -.-> TeyrChainNode
+    CumulusR[Pezcumulus Runtime Libraries] -.-> TeyrChainRuntime