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/election-provider-multi-phase/src/signed.rs

@@ -20,7 +20,7 @@
 use core::marker::PhantomData;
 
 use crate::{
-	unsigned::MinerConfig, Config, ElectionCompute, Pallet, QueuedSolution, RawSolution,
+	unsigned::MinerConfig, Config, ElectionCompute, Pezpallet, QueuedSolution, RawSolution,
 	ReadySolutionOf, SignedSubmissionIndices, SignedSubmissionNextIndex, SignedSubmissionsMap,
 	SnapshotMetadata, SolutionOf, SolutionOrSnapshotSize, Weight, WeightInfo,
 };
@@ -301,7 +301,7 @@ impl<T: Config> SignedSubmissions<T> {
 	pub fn insert(&mut self, submission: SignedSubmissionOf<T>) -> InsertResult<T> {
 		// verify the expectation that we never reuse an index
 		debug_assert!(!self.indices.iter().map(|(_, _, x)| x).any(|&idx| idx == self.next_idx));
-		let block_number = pezframe_system::Pallet::<T>::block_number();
+		let block_number = pezframe_system::Pezpallet::<T>::block_number();
 
 		let maybe_weakest = match self.indices.try_push((
 			submission.raw_solution.score,
@@ -376,7 +376,7 @@ where
 	}
 }
 
-impl<T: Config> Pallet<T> {
+impl<T: Config> Pezpallet<T> {
 	/// `Self` accessor for `SignedSubmission<T>`.
 	pub fn signed_submissions() -> SignedSubmissions<T> {
 		SignedSubmissions::<T>::get()