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

templates/solochain/node/src/command.rs

@@ -39,8 +39,9 @@ impl BizinikiwiCli for Cli {
 		Ok(match id {
 			"dev" => Box::new(chain_spec::development_chain_spec()?),
 			"" | "local" => Box::new(chain_spec::local_chain_spec()?),
-			path =>
-				Box::new(chain_spec::ChainSpec::from_json_file(std::path::PathBuf::from(path))?),
+			path => {
+				Box::new(chain_spec::ChainSpec::from_json_file(std::path::PathBuf::from(path))?)
+			},
 		})
 	}
 }
@@ -172,8 +173,9 @@ pub fn run() -> pezsc_cli::Result<()> {
 
 						cmd.run(client, inherent_benchmark_data()?, Vec::new(), &ext_factory)
 					},
-					BenchmarkCmd::Machine(cmd) =>
-						cmd.run(&config, BIZINIKIWI_REFERENCE_HARDWARE.clone()),
+					BenchmarkCmd::Machine(cmd) => {
+						cmd.run(&config, BIZINIKIWI_REFERENCE_HARDWARE.clone())
+					},
 				}
 			})
 		},