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/src/wasm/mod.rs

@@ -690,8 +690,9 @@ mod tests {
 			let entry = self.storage.entry(key.clone());
 			let result = match (entry, take_old) {
 				(Entry::Vacant(_), _) => WriteOutcome::New,
-				(Entry::Occupied(entry), false) =>
-					WriteOutcome::Overwritten(entry.remove().len() as u32),
+				(Entry::Occupied(entry), false) => {
+					WriteOutcome::Overwritten(entry.remove().len() as u32)
+				},
 				(Entry::Occupied(entry), true) => WriteOutcome::Taken(entry.remove()),
 			};
 			if let Some(value) = value {