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/executor/common/src/runtime_blob/runtime_blob.rs

@@ -191,8 +191,9 @@ impl RuntimeBlob {
 	/// Consumes this runtime blob and serializes it.
 	pub fn serialize(self) -> Vec<u8> {
 		match self.0 {
-			BlobKind::WebAssembly(raw_module) =>
-				serialize(raw_module).expect("serializing into a vec should succeed; qed"),
+			BlobKind::WebAssembly(raw_module) => {
+				serialize(raw_module).expect("serializing into a vec should succeed; qed")
+			},
 			BlobKind::PolkaVM(ref blob) => blob.1.to_vec(),
 		}
 	}