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

docs/sdk/packages/guides/first-runtime/src/lib.rs

@@ -53,7 +53,7 @@ construct_runtime!(
 		Sudo: pezpallet_sudo,
 		TransactionPayment: pezpallet_transaction_payment,
 
-		// Our local pallet
+		// Our local pezpallet
 		FirstPallet: our_first_pallet,
 	}
 );
@@ -285,7 +285,7 @@ impl_runtime_apis! {
 	}
 }
 
-/// Just a handy re-definition of some types based on what is already provided to the pallet
+/// Just a handy re-definition of some types based on what is already provided to the pezpallet
 /// configs.
 pub mod interface {
 	use super::Runtime;