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/pezpallets/validator-pool/src/mock.rs

@@ -15,7 +15,7 @@ pub type AccountId = u64;
 pub type Balance = u128;
 pub type BlockNumber = u64;
 
-// Configure a mock runtime to test the pallet.
+// Configure a mock runtime to test the pezpallet.
 // Note: We don't include pezpallet_session here because it requires complex Currency setup.
 // We can test SessionManager trait implementation directly.
 construct_runtime!(