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/client/network/src/lib.rs

@@ -290,8 +290,8 @@ where
 
 		// If the relay chain runtime does not support the new runtime API, fallback to the
 		// deprecated one.
-		let candidate_receipts = if teyrchain_host_runtime_api_version <
-			RuntimeApiRequest::CANDIDATES_PENDING_AVAILABILITY_RUNTIME_REQUIREMENT
+		let candidate_receipts = if teyrchain_host_runtime_api_version
+			< RuntimeApiRequest::CANDIDATES_PENDING_AVAILABILITY_RUNTIME_REQUIREMENT
 		{
 			#[allow(deprecated)]
 			relay_chain_interface
@@ -389,11 +389,12 @@ where
 
 			let block_announce_data = match BlockAnnounceData::decode_all(&mut data.as_slice()) {
 				Ok(r) => r,
-				Err(err) =>
+				Err(err) => {
 					return Err(Box::new(BlockAnnounceError(format!(
 						"Can not decode the `BlockAnnounceData`: {:?}",
 						err
-					))) as Box<_>),
+					))) as Box<_>)
+				},
 			};
 
 			if let Err(e) = block_announce_data.validate(header_encoded) {