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/primitives/aura/src/lib.rs

@@ -0,0 +1,54 @@
+// Copyright (C) Parity Technologies (UK) Ltd.
+// This file is part of Pezcumulus.
+// SPDX-License-Identifier: Apache-2.0
+
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// 	http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+//! Core primitives for Aura in Pezcumulus.
+//!
+//! In particular, this exposes the [`AuraUnincludedSegmentApi`] which is used to regulate
+//! the behavior of Aura within a teyrchain context.
+
+#![cfg_attr(not(feature = "std"), no_std)]
+
+pub use pezsp_consensus_aura::Slot;
+
+pezsp_api::decl_runtime_apis! {
+	/// This runtime API is used to inform potential block authors whether they will
+	/// have the right to author at a slot, assuming they have claimed the slot.
+	///
+	/// In particular, this API allows Aura-based teyrchains to regulate their "unincluded segment",
+	/// which is the section of the head of the chain which has not yet been made available in the
+	/// relay chain.
+	///
+	/// When the unincluded segment is short, Aura chains will allow authors to create multiple
+	/// blocks per slot in order to build a backlog. When it is saturated, this API will limit
+	/// the amount of blocks that can be created.
+	///
+	/// Changes:
+	/// - Version 2: Update to `can_build_upon` to take a relay chain `Slot` instead of a teyrchain `Slot`.
+	#[api_version(2)]
+	pub trait AuraUnincludedSegmentApi {
+		/// Whether it is legal to extend the chain, assuming the given block is the most
+		/// recently included one as-of the relay parent that will be built against, and
+		/// the given relay chain slot.
+		///
+		/// This should be consistent with the logic the runtime uses when validating blocks to
+		/// avoid issues.
+		///
+		/// When the unincluded segment is empty, i.e. `included_hash == at`, where at is the block
+		/// whose state we are querying against, this must always return `true` as long as the slot
+		/// is more recent than the included block itself.
+		fn can_build_upon(included_hash: Block::Hash, slot: Slot) -> bool;
+	}
+}