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

pezbridges/primitives/messages/src/lib.rs

@@ -291,8 +291,9 @@ impl<RelayerId> InboundLaneData<RelayerId> {
 	pub fn total_unrewarded_messages(&self) -> MessageNonce {
 		let relayers = &self.relayers;
 		match (relayers.front(), relayers.back()) {
-			(Some(front), Some(back)) =>
-				(front.messages.begin..=back.messages.end).saturating_len(),
+			(Some(front), Some(back)) => {
+				(front.messages.begin..=back.messages.end).saturating_len()
+			},
 			_ => 0,
 		}
 	}