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/rpcs/src/methods/mod.rs

@@ -0,0 +1,20 @@
+// 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.
+
+//! RPC methods are defined in this module. At the moment we have:
+//!
+//! - [`ChainHeadRpcMethods`] (and the types in [`chain_head`]): these methods
+//!   implement the RPC spec at <https://pezkuwichain.github.io/json-rpc-interface-spec/api/chainHead.html>
+//!
+//! We also have (although their use is not advised):
+//!
+//! - [`LegacyRpcMethods`] (and the types in [`legacy`]): a collection of legacy RPCs. These are not
+//!   well specified and may change in implementations without warning, but for those methods we
+//!   expose, we make a best effort to work against latest Bizinikiwi versions.
+
+pub mod chain_head;
+pub mod legacy;
+
+pub use chain_head::ChainHeadRpcMethods;
+pub use legacy::LegacyRpcMethods;