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/primitives/trie/src/cache/shared_cache.rs

@@ -410,8 +410,8 @@ where
 	H: AsRef<[u8]>,
 {
 	fn eq(&self, rhs: &ValueCacheKey<H>) -> bool {
-		self.storage_root.as_ref() == rhs.storage_root.as_ref() &&
-			self.storage_key == &*rhs.storage_key
+		self.storage_root.as_ref() == rhs.storage_root.as_ref()
+			&& self.storage_key == &*rhs.storage_key
 	}
 }