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/zombienet/zombienet-sdk/tests/zombie_ci/elastic_scaling/multiple_blocks_per_slot.rs

@@ -95,7 +95,9 @@ async fn build_network_config() -> Result<NetworkConfig, anyhow::Error> {
 				// Have to set a `with_node` outside of the loop below, so that `r` has the right
 				// type.
 				.with_validator(|node| node.with_name("validator-0"));
-			(1..9).fold(r, |acc, i| acc.with_validator(|node| node.with_name(&format!("validator-{i}"))))
+			(1..9).fold(r, |acc, i| {
+				acc.with_validator(|node| node.with_name(&format!("validator-{i}")))
+			})
 		})
 		.with_teyrchain(|p| {
 			p.with_id(PARA_ID)

pezcumulus/zombienet/zombienet-sdk/tests/zombie_ci/elastic_scaling/pov_recovery.rs

@@ -7,7 +7,7 @@ use std::{sync::Arc, time::Duration};
 use crate::utils::{initialize_network, BEST_BLOCK_METRIC};
 
 use pezcumulus_zombienet_sdk_helpers::{
-	assert_para_is_registered, assert_para_throughput, assign_cores, 
+	assert_para_is_registered, assert_para_throughput, assign_cores,
 };
 use pezkuwi_primitives::Id as ParaId;
 use serde_json::json;

pezcumulus/zombienet/zombienet-sdk/tests/zombie_ci/elastic_scaling/slot_based_authoring.rs

@@ -6,7 +6,7 @@ use std::time::Duration;
 
 use crate::utils::{initialize_network, BEST_BLOCK_METRIC};
 
-use pezcumulus_zombienet_sdk_helpers::{assign_cores};
+use pezcumulus_zombienet_sdk_helpers::assign_cores;
 use serde_json::json;
 use zombienet_orchestrator::network::node::LogLineCountOptions;
 use zombienet_sdk::{NetworkConfig, NetworkConfigBuilder};

pezcumulus/zombienet/zombienet-sdk/tests/zombie_ci/elastic_scaling/slot_based_rp_offset.rs

@@ -44,7 +44,9 @@ async fn elastic_scaling_slot_based_relay_parent_offset_test() -> Result<(), any
 				// type.
 				.with_validator(|node| node.with_name("validator-0"));
 
-			(1..6).fold(r, |acc, i| acc.with_validator(|node| node.with_name(&format!("validator-{i}"))))
+			(1..6).fold(r, |acc, i| {
+				acc.with_validator(|node| node.with_name(&format!("validator-{i}")))
+			})
 		})
 		.with_teyrchain(|p| {
 			p.with_id(2400)

pezcumulus/zombienet/zombienet-sdk/tests/zombie_ci/elastic_scaling/upgrade_to_3_cores.rs

@@ -8,7 +8,7 @@ use std::time::Duration;
 use crate::utils::initialize_network;
 
 use pezcumulus_zombienet_sdk_helpers::{
-	assert_para_throughput, assign_cores, runtime_upgrade, wait_for_upgrade, 
+	assert_para_throughput, assign_cores, runtime_upgrade, wait_for_upgrade,
 };
 use pezkuwi_primitives::Id as ParaId;
 use rstest::rstest;