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/teyrchains/integration-tests/emulated/tests/assets/asset-hub-pezkuwichain/src/lib.rs

@@ -70,12 +70,8 @@ mod imports {
 				LocalTeleportableToAssetHub as PenpalLocalTeleportableToAssetHub,
 				UsdtFromAssetHub as PenpalUsdtFromAssetHub,
 			},
-			PenpalAParaPezpallet,
-			PenpalAParaPezpallet as PenpalAPallet,
-			PenpalAssetOwner,
-			PenpalBParaPezpallet,
-			PenpalBParaPezpallet as PenpalBPallet,
-			ED as PENPAL_ED,
+			PenpalAParaPezpallet, PenpalAParaPezpallet as PenpalAPallet, PenpalAssetOwner,
+			PenpalBParaPezpallet, PenpalBParaPezpallet as PenpalBPallet, ED as PENPAL_ED,
 		},
 		pezkuwichain_emulated_chain::{
 			genesis::ED as PEZKUWICHAIN_ED,
@@ -85,8 +81,7 @@ mod imports {
 				xcm_config::UniversalLocation as PezkuwichainUniversalLocation, Dmp,
 				OriginCaller as PezkuwichainOriginCaller,
 			},
-			PezkuwichainRelayPezpallet,
-			PezkuwichainRelayPezpallet as PezkuwichainPallet,
+			PezkuwichainRelayPezpallet, PezkuwichainRelayPezpallet as PezkuwichainPallet,
 		},
 		AssetHubPezkuwichainPara as AssetHubPezkuwichain,
 		AssetHubPezkuwichainParaReceiver as AssetHubPezkuwichainReceiver,