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/parameters/src/tests/mock.rs

@@ -138,7 +138,7 @@ impl Config for Runtime {
 
 #[docify::export(usage)]
 impl pezpallet_example_basic::Config for Runtime {
-	// Use the dynamic key in the pallet config:
+	// Use the dynamic key in the pezpallet config:
 	type MagicNumber = dynamic_params::pallet1::Key1;
 	type WeightInfo = ();
 }
@@ -159,7 +159,7 @@ pub fn new_test_ext() -> pezsp_io::TestExternalities {
 }
 
 pub(crate) fn assert_last_event(generic_event: RuntimeEvent) {
-	let events = pezframe_system::Pallet::<Runtime>::events();
+	let events = pezframe_system::Pezpallet::<Runtime>::events();
 	// compare to the last event record
 	let pezframe_system::EventRecord { event, .. } = &events.last().expect("Event expected");
 	assert_eq!(event, &generic_event);