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

pezkuwi/node/core/prospective-teyrchains/src/tests.rs

@@ -343,9 +343,9 @@ async fn handle_leaf_activation(
 			AllMessages::RuntimeApi(RuntimeApiMessage::Request(
 				parent,
 				RuntimeApiRequest::BackingConstraints(p_id, tx),
-			)) if parent == *hash &&
-				test_state.runtime_api_version >=
-					RuntimeApiRequest::CONSTRAINTS_RUNTIME_REQUIREMENT =>
+			)) if parent == *hash
+				&& test_state.runtime_api_version
+					>= RuntimeApiRequest::CONSTRAINTS_RUNTIME_REQUIREMENT =>
 			{
 				let PerParaData { min_relay_parent, head_data, pending_availability: _ } =
 					leaf.para_data(p_id);
@@ -362,9 +362,9 @@ async fn handle_leaf_activation(
 			AllMessages::RuntimeApi(RuntimeApiMessage::Request(
 				parent,
 				RuntimeApiRequest::BackingConstraints(_p_id, tx),
-			)) if parent == *hash &&
-				test_state.runtime_api_version <
-					RuntimeApiRequest::CONSTRAINTS_RUNTIME_REQUIREMENT =>
+			)) if parent == *hash
+				&& test_state.runtime_api_version
+					< RuntimeApiRequest::CONSTRAINTS_RUNTIME_REQUIREMENT =>
 			{
 				tx.send(Err(RUNTIME_API_NOT_SUPPORTED)).unwrap();
 				None