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.

bizinikiwi/client/rpc-api/src/system/error.rs

@@ -0,0 +1,66 @@
+// This file is part of Bizinikiwi.
+
+// Copyright (C) Parity Technologies (UK) Ltd.
+// SPDX-License-Identifier: GPL-3.0-or-later WITH Classpath-exception-2.0
+
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with this program. If not, see <https://www.gnu.org/licenses/>.
+
+//! System RPC module errors.
+
+use crate::system::helpers::Health;
+use jsonrpsee::types::{
+	error::{ErrorCode, ErrorObject},
+	ErrorObjectOwned,
+};
+
+/// System RPC Result type.
+pub type Result<T> = std::result::Result<T, Error>;
+
+/// System RPC errors.
+#[derive(Debug, thiserror::Error)]
+pub enum Error {
+	/// Provided block range couldn't be resolved to a list of blocks.
+	#[error("Node is not fully functional: {}", .0)]
+	NotHealthy(Health),
+	/// Peer argument is malformatted.
+	#[error("{0}")]
+	MalformattedPeerArg(String),
+	/// Call to an unsafe RPC was denied.
+	#[error(transparent)]
+	UnsafeRpcCalled(#[from] crate::policy::UnsafeRpcError),
+	/// Internal error.
+	#[error("{0}")]
+	Internal(String),
+}
+
+// Base code for all system errors.
+const BASE_ERROR: i32 = crate::error::base::SYSTEM;
+// Provided block range couldn't be resolved to a list of blocks.
+const NOT_HEALTHY_ERROR: i32 = BASE_ERROR + 1;
+// Peer argument is malformatted.
+const MALFORMATTED_PEER_ARG_ERROR: i32 = BASE_ERROR + 2;
+
+impl From<Error> for ErrorObjectOwned {
+	fn from(e: Error) -> ErrorObjectOwned {
+		match e {
+			Error::NotHealthy(ref h) =>
+				ErrorObject::owned(NOT_HEALTHY_ERROR, e.to_string(), Some(h)),
+			Error::MalformattedPeerArg(e) =>
+				ErrorObject::owned(MALFORMATTED_PEER_ARG_ERROR, e, None::<()>),
+			Error::UnsafeRpcCalled(e) => e.into(),
+			Error::Internal(e) =>
+				ErrorObjectOwned::owned(ErrorCode::InternalError.code(), e, None::<()>),
+		}
+	}
+}