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/delegated-staking/src/mock.rs

@@ -303,8 +303,8 @@ pub(crate) fn start_era(era: pezsp_staking::EraIndex) {
 }
 
 pub(crate) fn eq_stake(who: AccountId, total: Balance, active: Balance) -> bool {
-	Staking::stake(&who).unwrap() == Stake { total, active } &&
-		get_agent_ledger(&who).ledger.stakeable_balance() == total
+	Staking::stake(&who).unwrap() == Stake { total, active }
+		&& get_agent_ledger(&who).ledger.stakeable_balance() == total
 }
 
 pub(crate) fn get_agent_ledger(agent: &AccountId) -> AgentLedgerOuter<T> {