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/primitives/timestamp/src/lib.rs

@@ -61,8 +61,8 @@ impl InherentDataProvider {
 	pub fn provide_inherent_data(&self, inherent_data: &mut InherentData) -> Result<(), Error> {
 		// As the teyrchain starts building at around `relay_chain_slot + 1` we use that slot to
 		// calculate the timestamp.
-		let data: InherentType = ((*self.relay_chain_slot + 1) *
-			self.relay_chain_slot_duration.as_millis() as u64)
+		let data: InherentType = ((*self.relay_chain_slot + 1)
+			* self.relay_chain_slot_duration.as_millis() as u64)
 			.into();
 
 		inherent_data.put_data(INHERENT_IDENTIFIER, &data)