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

pezcumulus/teyrchains/runtimes/bridge-hubs/common/src/barriers.rs

@@ -47,8 +47,9 @@ where
 		message.matcher().match_next_inst_while(
 			|_| true,
 			|inst| match inst {
-				ExportMessage { network, .. } if ToGlobalConsensus::contains(network) =>
-					Err(ProcessMessageError::Unsupported),
+				ExportMessage { network, .. } if ToGlobalConsensus::contains(network) => {
+					Err(ProcessMessageError::Unsupported)
+				},
 				_ => Ok(ControlFlow::Continue(())),
 			},
 		)?;

pezcumulus/teyrchains/runtimes/bridge-hubs/common/src/message_queue.rs

@@ -122,8 +122,9 @@ where
 	) -> Result<bool, ProcessMessageError> {
 		use AggregateMessageOrigin::*;
 		match origin {
-			Here | Parent | Sibling(_) =>
-				XcmpProcessor::process_message(message, origin, meter, id),
+			Here | Parent | Sibling(_) => {
+				XcmpProcessor::process_message(message, origin, meter, id)
+			},
 			Snowbridge(_) => SnowbridgeProcessor::process_message(message, origin, meter, id),
 			SnowbridgeV2(_) => Err(ProcessMessageError::Unsupported),
 		}
@@ -155,8 +156,9 @@ where
 	) -> Result<bool, ProcessMessageError> {
 		use AggregateMessageOrigin::*;
 		match origin {
-			Here | Parent | Sibling(_) =>
-				XcmpProcessor::process_message(message, origin, meter, id),
+			Here | Parent | Sibling(_) => {
+				XcmpProcessor::process_message(message, origin, meter, id)
+			},
 			Snowbridge(_) => SnowbridgeProcessor::process_message(message, origin, meter, id),
 			SnowbridgeV2(_) => SnowbridgeProcessorV2::process_message(message, origin, meter, id),
 		}