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/contributor/CONTRIBUTING.md

@@ -34,7 +34,7 @@ All branches must follow these naming patterns:
 | --- | --- | --- |
 | `feature/<name>` | New features | `feature/parliamentary-nft-voting` |
 | `fix/<name>` | Bug fixes | `fix/presale-overflow-check` |
-| `pallet/<name>` | Pallet-specific changes | `pallet/welati-liquid-democracy` |
+| `pezpallet/<name>` | Pezpallet-specific changes | `pezpallet/welati-liquid-democracy` |
 | `runtime/<name>` | Runtime configuration changes | `runtime/xcm-v5-upgrade` |
 | `docs/<name>` | Documentation updates | `docs/token-economics` |
 | `ci/<name>` | CI/CD changes | `ci/benchmark-workflow` |