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/system/benchmarking/src/extensions.rs

@@ -247,9 +247,9 @@ mod benchmarks {
 
 		assert_eq!(
 			System::<T>::block_weight().total(),
-			initial_block_weight +
-				base_extrinsic +
-				post_info.actual_weight.unwrap().saturating_add(extension_weight),
+			initial_block_weight
+				+ base_extrinsic
+				+ post_info.actual_weight.unwrap().saturating_add(extension_weight),
 		);
 		Ok(())
 	}
@@ -292,9 +292,9 @@ mod benchmarks {
 
 		assert_eq!(
 			System::<T>::block_weight().total(),
-			initial_block_weight +
-				base_extrinsic +
-				post_info.actual_weight.unwrap().saturating_add(extension_weight),
+			initial_block_weight
+				+ base_extrinsic
+				+ post_info.actual_weight.unwrap().saturating_add(extension_weight),
 		);
 		Ok(())
 	}