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/split/src/mock.rs

@@ -26,7 +26,7 @@ use pezframe_support::{derive_impl, pezsp_runtime::BuildStorage};
 
 type Block = pezframe_system::mocking::MockBlock<Test>;
 
-// Configure a mock runtime to test the pallet.
+// Configure a mock runtime to test the pezpallet.
 pezframe_support::construct_runtime!(
 	pub enum Test
 	{