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/timestamp/src/lib.rs

@@ -0,0 +1,70 @@
+// 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.
+
+//! Pezcumulus timestamp related primitives.
+//!
+//! Provides a [`InherentDataProvider`] that should be used in the validation phase of the
+//! teyrchain. It will be used to create the inherent data and that will be used to check the
+//! inherents inside the teyrchain block (in this case the timestamp inherent). As we don't have
+//! access to any clock from the runtime the timestamp is always passed as an inherent into the
+//! runtime. To check this inherent when validating the block, we will use the relay chain slot. As
+//! the relay chain slot is derived from a timestamp, we can easily convert it back to a timestamp
+//! by multiplying it with the slot duration. By comparing the relay chain slot derived timestamp
+//! with the timestamp we can ensure that the teyrchain timestamp is reasonable.
+
+#![cfg_attr(not(feature = "std"), no_std)]
+
+use core::time::Duration;
+use cumulus_primitives_core::relay_chain::Slot;
+use pezsp_inherents::{Error, InherentData};
+
+pub use pezsp_timestamp::{InherentType, INHERENT_IDENTIFIER};
+
+/// The inherent data provider for the timestamp.
+///
+/// This should be used in the runtime when checking the inherents in the validation phase of the
+/// teyrchain.
+pub struct InherentDataProvider {
+	relay_chain_slot: Slot,
+	relay_chain_slot_duration: Duration,
+}
+
+impl InherentDataProvider {
+	/// Create `Self` from the given relay chain slot and slot duration.
+	pub fn from_relay_chain_slot_and_duration(
+		relay_chain_slot: Slot,
+		relay_chain_slot_duration: Duration,
+	) -> Self {
+		Self { relay_chain_slot, relay_chain_slot_duration }
+	}
+
+	/// Create the inherent data.
+	pub fn create_inherent_data(&self) -> Result<InherentData, Error> {
+		let mut inherent_data = InherentData::new();
+		self.provide_inherent_data(&mut inherent_data).map(|_| inherent_data)
+	}
+
+	/// Provide the inherent data into the given `inherent_data`.
+	pub fn provide_inherent_data(&self, inherent_data: &mut InherentData) -> Result<(), Error> {
+		// As the teyrchain starts building at around `relay_chain_slot + 1` we use that slot to
+		// calculate the timestamp.
+		let data: InherentType = ((*self.relay_chain_slot + 1) *
+			self.relay_chain_slot_duration.as_millis() as u64)
+			.into();
+
+		inherent_data.put_data(INHERENT_IDENTIFIER, &data)
+	}
+}