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/primitives/arithmetic/Cargo.toml

@@ -0,0 +1,48 @@
+[package]
+name = "pezsp-arithmetic"
+version = "23.0.0"
+authors.workspace = true
+edition.workspace = true
+license = "Apache-2.0"
+homepage.workspace = true
+repository.workspace = true
+description = "Minimal fixed point arithmetic primitives and types for runtime."
+documentation = "https://docs.rs/pezsp-arithmetic"
+readme = "README.md"
+
+[lints]
+workspace = true
+
+[package.metadata.docs.rs]
+targets = ["x86_64-unknown-linux-gnu"]
+
+[[bench]]
+name = "bench"
+harness = false
+
+[dependencies]
+codec = { features = ["derive", "max-encoded-len"], workspace = true }
+docify = { workspace = true }
+integer-sqrt = { workspace = true }
+num-traits = { workspace = true }
+scale-info = { features = ["derive"], workspace = true }
+serde = { features = ["alloc", "derive"], optional = true, workspace = true }
+static_assertions = { workspace = true, default-features = true }
+
+[dev-dependencies]
+criterion = { workspace = true, default-features = true }
+primitive-types = { workspace = true, default-features = true }
+rand = { workspace = true, default-features = true }
+pezsp-crypto-hashing = { workspace = true, default-features = true }
+
+[features]
+default = ["std"]
+std = [
+	"codec/std",
+	"num-traits/std",
+	"scale-info/std",
+	"serde/std",
+	"pezsp-crypto-hashing/std",
+]
+# Serde support without relying on std features.
+serde = ["dep:serde", "scale-info/serde"]