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

pezkuwi/xcm/xcm-executor/src/traits/asset_transfer.rs

@@ -66,8 +66,8 @@ pub trait XcmAssetTransfers {
 
 		// try to determine reserve location based on asset id/location
 		let asset_location = asset.id.0.chain_location();
-		if asset_location == Location::here() ||
-			Self::IsTeleporter::contains(asset, &asset_location)
+		if asset_location == Location::here()
+			|| Self::IsTeleporter::contains(asset, &asset_location)
 		{
 			// if the asset is local, then it's a local reserve
 			// it's also a local reserve if the asset's location is not `here` but it's a location