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/client/network/transactions/src/lib.rs

@@ -443,8 +443,9 @@ where
 
 	fn on_handle_transaction_import(&mut self, who: PeerId, import: TransactionImport) {
 		match import {
-			TransactionImport::KnownGood =>
-				self.network.report_peer(who, rep::ANY_TRANSACTION_REFUND),
+			TransactionImport::KnownGood => {
+				self.network.report_peer(who, rep::ANY_TRANSACTION_REFUND)
+			},
 			TransactionImport::NewGood => self.network.report_peer(who, rep::GOOD_TRANSACTION),
 			TransactionImport::Bad => self.network.report_peer(who, rep::BAD_TRANSACTION),
 			TransactionImport::None => {},