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

bizinikiwi/pezframe/vesting/src/tests.rs

@@ -1156,16 +1156,16 @@ fn vested_transfer_less_than_existential_deposit_fails() {
 	ExtBuilder::default().existential_deposit(4 * ED).build().execute_with(|| {
 		// MinVestedTransfer is less the ED.
 		assert!(
-			<Test as Config>::Currency::minimum_balance() >
-				<Test as Config>::MinVestedTransfer::get()
+			<Test as Config>::Currency::minimum_balance()
+				> <Test as Config>::MinVestedTransfer::get()
 		);
 
 		let sched =
 			VestingInfo::new(<Test as Config>::MinVestedTransfer::get() as u64, 1u64, 10u64);
 		// The new account balance with the schedule's locked amount would be less than ED.
 		assert!(
-			Balances::free_balance(&99) + sched.locked() <
-				<Test as Config>::Currency::minimum_balance()
+			Balances::free_balance(&99) + sched.locked()
+				< <Test as Config>::Currency::minimum_balance()
 		);
 
 		// vested_transfer fails.