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/signer/src/lib.rs

@@ -0,0 +1,55 @@
+// 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.
+
+//! # Subxt-signer
+//!
+//! The main output from this crate is the [`sr25519::Keypair`], which can
+//! be constructed from a bip39 phrase, secret URI or raw seed, and used to
+//! sign and verify arbitrary messages. This crate is aligned with how Bizinikiwi's
+//! `sp_core` crate constructs and signs keypairs, but is lighter on dependencies
+//! and can support compilation to WASM with the `web` feature.
+//!
+//! Enable the `subxt` feature to enable use of this [`sr25519::Keypair`] in signing
+//! subxt transactions for chains supporting sr25519 signatures.
+
+#![cfg_attr(docsrs, feature(doc_cfg))]
+#![cfg_attr(not(feature = "std"), no_std)]
+
+extern crate alloc;
+
+#[macro_use]
+mod utils;
+mod crypto;
+
+// An sr25519 key pair implementation.
+#[cfg(feature = "sr25519")]
+#[cfg_attr(docsrs, doc(cfg(feature = "sr25519")))]
+pub mod sr25519;
+
+// An ecdsa key pair implementation.
+#[cfg(feature = "ecdsa")]
+#[cfg_attr(docsrs, doc(cfg(feature = "ecdsa")))]
+pub mod ecdsa;
+
+// An ethereum signer implementation.
+#[cfg(feature = "unstable-eth")]
+#[cfg_attr(docsrs, doc(cfg(feature = "unstable-eth")))]
+pub mod eth;
+
+/// A pezkuwi-js account json loader.
+#[cfg(feature = "pezkuwi-js-compat")]
+#[cfg_attr(docsrs, doc(cfg(feature = "pezkuwi-js-compat")))]
+pub mod pezkuwi_js_compat;
+
+// Re-export useful bits and pieces for generating a Pair from a phrase,
+// namely the Mnemonic struct.
+pub use bip39;
+
+// Used to hold strings in a more secure manner in memory for a little extra
+// protection.
+pub use secrecy::{ExposeSecret, SecretString};
+
+// SecretUri's can be parsed from strings and used to generate key pairs.
+// DeriveJunctions are the "path" part of these SecretUris.
+pub use crypto::{DEV_PHRASE, DeriveJunction, SecretUri, SecretUriError};