fix: Complete snowbridge pezpallet rebrand and critical bug fixes

- snowbridge-pezpallet-* → pezsnowbridge-pezpallet-* (201 refs)
- pallet/ directories → pezpallet/ (4 locations)
- Fixed pezpallet.rs self-include recursion bug
- Fixed sc-chain-spec hardcoded crate name in derive macro
- Reverted .pezpallet_by_name() to .pallet_by_name() (subxt API)
- Added BizinikiwiConfig type alias for zombienet tests
- Deleted obsolete session state files

Verified: pezsnowbridge-pezpallet-*, pezpallet-staking,
pezpallet-staking-async, pezframe-benchmarking-cli all pass cargo check

bizinikiwi/pezframe/staking-async/runtimes/papi-tests/README.md

@@ -25,7 +25,7 @@ the setup, see [Setup](#setup).
 ## Runtime Overview
 
 This teyrchain runtime is a fake fork of the asset-hub next (created originally by Dónal). It is here
-to test the async-staking pallet in a real environment.
+to test the async-staking pezpallet in a real environment.
 
 This teyrchain contains:
 
@@ -36,7 +36,7 @@ This teyrchain contains:
   `pezpallet-delegated-staking`.
 
 All of the above are means to stake and select validators for the RELAY-CHAIN, which is eventually
-communicated to it via the `pezpallet-staking-async-rc-client` pallet.
+communicated to it via the `pezpallet-staking-async-rc-client` pezpallet.
 
 A lot more is in the runtime, and can be eventually removed.