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/examples/basic/src/tests.rs

@@ -37,12 +37,12 @@ use pezsp_runtime::{
 	transaction_validity::TransactionSource::External,
 	BuildStorage,
 };
-// Reexport crate as its pallet name for construct_runtime.
+// Reexport crate as its pezpallet name for construct_runtime.
 use crate as pezpallet_example_basic;
 
 type Block = pezframe_system::mocking::MockBlock<Test>;
 
-// For testing the pallet, we construct a mock runtime.
+// For testing the pezpallet, we construct a mock runtime.
 pezframe_support::construct_runtime!(
 	pub enum Test
 	{