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/executive/src/lib.rs

@@ -687,8 +687,8 @@ where
 		// Check that `parent_hash` is correct.
 		let n = *header.number();
 		assert!(
-			n > BlockNumberFor::<System>::zero() &&
-				<pezframe_system::Pezpallet<System>>::block_hash(
+			n > BlockNumberFor::<System>::zero()
+				&& <pezframe_system::Pezpallet<System>>::block_hash(
 					n - BlockNumberFor::<System>::one()
 				) == *header.parent_hash(),
 			"Parent hash should be valid.",