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/contracts/fixtures/Cargo.toml

@@ -5,7 +5,7 @@ version = "1.0.0"
 authors.workspace = true
 edition.workspace = true
 license.workspace = true
-description = "Fixtures for testing contracts pallet."
+description = "Fixtures for testing contracts pezpallet."
 documentation = "https://docs.rs/pezpallet-contracts-fixtures"
 repository = { workspace = true }
 homepage = { workspace = true }