feat: Vendor pezkuwi-subxt and pezkuwi-zombienet-sdk into monorepo

- Add pezkuwi-subxt crates to vendor/pezkuwi-subxt
- Add pezkuwi-zombienet-sdk crates to vendor/pezkuwi-zombienet-sdk
- Convert git dependencies to path dependencies
- Add vendor crates to workspace members
- Remove test/example crates from vendor (not needed for SDK)
- Fix feature propagation issues detected by zepter
- Fix workspace inheritance for internal dependencies
- All 606 crates now in workspace
- All 6919 internal dependency links verified correct
- No git dependencies remaining

vendor/pezkuwi-subxt/codegen/src/ir.rs

@@ -0,0 +1,34 @@
+// Copyright 2019-2025 Parity Technologies (UK) Ltd.
+// This file is dual-licensed as Apache-2.0 or GPL-3.0.
+// see LICENSE for license details.
+
+use crate::error::CodegenError;
+use syn::token;
+
+#[derive(Debug, PartialEq, Eq)]
+pub struct ItemMod {
+	vis: syn::Visibility,
+	mod_token: token::Mod,
+	pub ident: syn::Ident,
+	brace: token::Brace,
+	items: Vec<syn::Item>,
+}
+
+impl TryFrom<syn::ItemMod> for ItemMod {
+	type Error = CodegenError;
+
+	fn try_from(module: syn::ItemMod) -> Result<Self, Self::Error> {
+		let (brace, items) = match module.content {
+			Some((brace, items)) => (brace, items),
+			None => return Err(CodegenError::InvalidModule(module.ident.span())),
+		};
+
+		Ok(Self { vis: module.vis, mod_token: module.mod_token, ident: module.ident, brace, items })
+	}
+}
+
+impl ItemMod {
+	pub fn rust_items(&self) -> impl Iterator<Item = &syn::Item> {
+		self.items.iter()
+	}
+}