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

.config/taplo.toml

@@ -2,7 +2,7 @@
 
 # ignore zombienet as they do some deliberate custom toml stuff
 exclude = [
-  "bridges/testing/**",
+  "pezbridges/testing/**",
   "pezcumulus/zombienet/**",
   "pezkuwi/node/malus/integrationtests/**",
   "pezkuwi/zombienet_tests/**",