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/minimal/node/src/command.rs

@@ -50,8 +50,9 @@ impl BizinikiwiCli for Cli {
 	fn load_spec(&self, id: &str) -> Result<Box<dyn pezsc_service::ChainSpec>, String> {
 		Ok(match id {
 			"dev" => Box::new(chain_spec::development_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))?)
+			},
 		})
 	}
 }