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/runtime/common/src/slots/mod.rs

@@ -314,10 +314,11 @@ impl<T: Config> Pezpallet<T> {
 		let mut tracker = alloc::collections::btree_map::BTreeMap::new();
 		Leases::<T>::get(para).into_iter().for_each(|lease| match lease {
 			Some((who, amount)) => match tracker.get(&who) {
-				Some(prev_amount) =>
+				Some(prev_amount) => {
 					if amount > *prev_amount {
 						tracker.insert(who, amount);
-					},
+					}
+				},
 				None => {
 					tracker.insert(who, amount);
 				},
@@ -432,12 +433,13 @@ impl<T: Config> Leaser<BlockNumberFor<T>> for Pezpallet<T> {
 		Leases::<T>::get(para)
 			.into_iter()
 			.map(|lease| match lease {
-				Some((who, amount)) =>
+				Some((who, amount)) => {
 					if &who == leaser {
 						amount
 					} else {
 						Zero::zero()
-					},
+					}
+				},
 				None => Zero::zero(),
 			})
 			.max()