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/client/consensus/beefy/src/justification.rs

@@ -33,8 +33,9 @@ pub(crate) fn proof_block_num_and_set_id<Block: BlockT, AuthorityId: AuthorityId
 	proof: &BeefyVersionedFinalityProof<Block, AuthorityId>,
 ) -> (NumberFor<Block>, ValidatorSetId) {
 	match proof {
-		VersionedFinalityProof::V1(sc) =>
-			(sc.commitment.block_number, sc.commitment.validator_set_id),
+		VersionedFinalityProof::V1(sc) => {
+			(sc.commitment.block_number, sc.commitment.validator_set_id)
+		},
 	}
 }