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/network/protocol/src/request_response/outgoing.rs

@@ -91,9 +91,9 @@ impl RequestError {
 	/// Whether the error represents some kind of timeout condition.
 	pub fn is_timed_out(&self) -> bool {
 		match self {
-			Self::Canceled(_) |
-			Self::NetworkError(network::RequestFailure::Obsolete) |
-			Self::NetworkError(network::RequestFailure::Network(
+			Self::Canceled(_)
+			| Self::NetworkError(network::RequestFailure::Obsolete)
+			| Self::NetworkError(network::RequestFailure::Network(
 				network::OutboundFailure::Timeout,
 			)) => true,
 			_ => false,