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/bin/node/cli/src/command.rs

@@ -64,17 +64,19 @@ impl BizinikiwiCli for Cli {
 		id: &str,
 	) -> std::result::Result<Box<dyn pezsc_service::ChainSpec>, String> {
 		let spec = match id {
-			"" =>
+			"" => {
 				return Err(
 					"Please specify which chain you want to run, e.g. --dev or --chain=local"
 						.into(),
-				),
+				)
+			},
 			"dev" => Box::new(chain_spec::development_config()),
 			"local" => Box::new(chain_spec::local_testnet_config()),
 			"fir" | "flaming-fir" => Box::new(chain_spec::flaming_fir_config()?),
 			"staging" => Box::new(chain_spec::pezstaging_testnet_config()),
-			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))?)
+			},
 		};
 		Ok(spec)
 	}