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/service/src/lib.rs

@@ -543,8 +543,9 @@ where
 					TransactionImport::NewGood
 				},
 				Err(e) => match e.into_pool_error() {
-					Ok(pezsc_transaction_pool_api::error::Error::AlreadyImported(_)) =>
-						TransactionImport::KnownGood,
+					Ok(pezsc_transaction_pool_api::error::Error::AlreadyImported(_)) => {
+						TransactionImport::KnownGood
+					},
 					Ok(_) => TransactionImport::Bad,
 					Err(_) => {
 						// it is not bad at least, just some internal node logic error, so peer is