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

pezbridges/modules/xcm-bridge-hub/src/mock.rs

@@ -643,8 +643,8 @@ impl MessageDispatch for TestMessageDispatch {
 	type LaneId = TestLaneIdType;
 
 	fn is_active(lane: Self::LaneId) -> bool {
-		pezframe_support::storage::unhashed::take::<bool>(&(b"inactive", lane).encode()[..]) !=
-			Some(false)
+		pezframe_support::storage::unhashed::take::<bool>(&(b"inactive", lane).encode()[..])
+			!= Some(false)
 	}
 
 	fn dispatch_weight(