style: Migrate to stable-only rustfmt configuration

- Remove nightly-only features from .rustfmt.toml and vendor/ss58-registry/rustfmt.toml
- Removed features: imports_granularity, wrap_comments, comment_width,
  reorder_impl_items, spaces_around_ranges, binop_separator,
  match_arm_blocks, trailing_semicolon, trailing_comma
- Format all 898 affected files with stable rustfmt
- Ensures long-term reliability without nightly toolchain dependency

bizinikiwi/pezframe/examples/multi-block-migrations/src/migrations/v1/tests.rs

@@ -41,9 +41,9 @@ fn lazy_migration_works() {
 		}
 
 		// Give it enough weight do do exactly 16 iterations:
-		let limit = <T as pezpallet_migrations::Config>::WeightInfo::progress_mbms_none() +
-			pezpallet_migrations::Pezpallet::<T>::exec_migration_max_weight() +
-			weights::BizinikiwiWeight::<T>::step() * 16;
+		let limit = <T as pezpallet_migrations::Config>::WeightInfo::progress_mbms_none()
+			+ pezpallet_migrations::Pezpallet::<T>::exec_migration_max_weight()
+			+ weights::BizinikiwiWeight::<T>::step() * 16;
 		MigratorServiceWeight::set(&limit);
 
 		System::set_block_number(1);