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/pezframe/contracts/fixtures/build.rs

@@ -224,8 +224,8 @@ fn post_process_wasm(input_path: &Path, output_path: &Path) -> Result<()> {
 		deserialize_file(input_path).with_context(|| format!("Failed to read {:?}", input_path))?;
 	if let Some(section) = module.export_section_mut() {
 		section.entries_mut().retain(|entry| {
-			matches!(entry.internal(), Internal::Function(_)) &&
-				(entry.field() == "call" || entry.field() == "deploy")
+			matches!(entry.internal(), Internal::Function(_))
+				&& (entry.field() == "call" || entry.field() == "deploy")
 		});
 	}