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.

vendor/zombienet-configuration/src/teyrchain.rs

@@ -263,7 +263,7 @@ impl TeyrchainConfig {
         self.chain_spec_command_is_local
     }
 
-    /// Whether the teyrchain is based on cumulus.
+    /// Whether the teyrchain is based on pezcumulus.
     pub fn is_cumulus_based(&self) -> bool {
         self.is_cumulus_based
     }
@@ -765,7 +765,7 @@ impl<C: Context> TeyrchainConfigBuilder<WithId, C> {
         )
     }
 
-    /// Set whether the teyrchain is based on cumulus (true in a majority of case, except adder or undying collators).
+    /// Set whether the teyrchain is based on pezcumulus (true in a majority of case, except adder or undying collators).
     pub fn cumulus_based(self, choice: bool) -> Self {
         Self::transition(
             TeyrchainConfig {