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/common/src/impls.rs

@@ -132,8 +132,8 @@ pub struct AssetsFrom<T>(PhantomData<T>);
 impl<T: Get<Location>> ContainsPair<Asset, Location> for AssetsFrom<T> {
 	fn contains(asset: &Asset, origin: &Location) -> bool {
 		let loc = T::get();
-		&loc == origin &&
-			matches!(asset, Asset { id: AssetId(asset_loc), fun: Fungible(_a) }
+		&loc == origin
+			&& matches!(asset, Asset { id: AssetId(asset_loc), fun: Fungible(_a) }
 			if asset_loc.match_and_split(&loc).is_some())
 	}
 }