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/service/src/overseer.rs

@@ -295,10 +295,11 @@ where
 		.collation_generation(DummySubsystem)
 		.collator_protocol({
 			let side = match is_teyrchain_node {
-				IsTeyrchainNode::Collator(_) | IsTeyrchainNode::FullNode =>
+				IsTeyrchainNode::Collator(_) | IsTeyrchainNode::FullNode => {
 					return Err(Error::Overseer(SubsystemError::Context(
 						"build validator overseer for teyrchain node".to_owned(),
-					))),
+					)))
+				},
 				IsTeyrchainNode::No => ProtocolSide::Validator {
 					keystore: keystore.clone(),
 					eviction_policy: Default::default(),
@@ -466,10 +467,11 @@ where
 		.collation_generation(CollationGenerationSubsystem::new(Metrics::register(registry)?))
 		.collator_protocol({
 			let side = match is_teyrchain_node {
-				IsTeyrchainNode::No =>
+				IsTeyrchainNode::No => {
 					return Err(Error::Overseer(SubsystemError::Context(
 						"build teyrchain node overseer for validator".to_owned(),
-					))),
+					)))
+				},
 				IsTeyrchainNode::Collator(collator_pair) => ProtocolSide::Collator {
 					peer_id: network_service.local_peer_id(),
 					collator_pair,