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/elections-phragmen/src/migrations/unlock_and_unreserve_all_funds.rs

@@ -211,8 +211,8 @@ where
 		let bugged_deposits = all_accounts
 			.iter()
 			.filter(|account| {
-				account_deposited_sums.get(&account).unwrap_or(&Zero::zero()) >
-					account_reserved_before.get(&account).unwrap_or(&Zero::zero())
+				account_deposited_sums.get(&account).unwrap_or(&Zero::zero())
+					> account_reserved_before.get(&account).unwrap_or(&Zero::zero())
 			})
 			.count();