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/pezframe/merkle-mountain-range/src/lib.rs

@@ -405,9 +405,9 @@ impl<T: Config<I>, I: 'static> Pezpallet<T, I> {
 		leaves: Vec<LeafOf<T, I>>,
 		proof: LeafProof<HashOf<T, I>>,
 	) -> Result<(), Error> {
-		if proof.leaf_count > NumberOfLeaves::<T, I>::get() ||
-			proof.leaf_count == 0 ||
-			proof.items.len().saturating_add(leaves.len()) as u64 > proof.leaf_count
+		if proof.leaf_count > NumberOfLeaves::<T, I>::get()
+			|| proof.leaf_count == 0
+			|| proof.items.len().saturating_add(leaves.len()) as u64 > proof.leaf_count
 		{
 			return Err(
 				Error::Verify.log_debug("The proof has incorrect number of leaves or proof items.")