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

pezcumulus/teyrchains/pezpallets/ping/src/lib.rs

@@ -220,8 +220,9 @@ pub mod pezpallet {
 					fallback_max_weight: None,
 				}]),
 			) {
-				Ok((hash, cost)) =>
-					Self::deposit_event(Event::PongSent(para, seq, payload, hash, cost)),
+				Ok((hash, cost)) => {
+					Self::deposit_event(Event::PongSent(para, seq, payload, hash, cost))
+				},
 				Err(e) => Self::deposit_event(Event::ErrorSendingPong(e, para, seq, payload)),
 			}
 			Ok(())