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

pezkuwi/roadmap/implementers-guide/src/protocol-validator-disabling.md

@@ -268,7 +268,7 @@ the set by slashes. ([**Point 6.**](#system-overview))
 ## Forcing New Era
 
 Previous implementation of disabling had some limited mechanisms allowing for validators disablement and if too many
-were disabled forcing a new era (new election). Frame staking pallet offered the ability to force a new era but it was
+were disabled forcing a new era (new election). Frame staking pezpallet offered the ability to force a new era but it was
 also deemed unsafe as it could be abused and compromised the security of the network for instance by weakening the
 randomness used throughout the protocol.