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/support/src/storage/stream_iter.rs

@@ -592,7 +592,10 @@ mod tests {
 		pezsp_io::TestExternalities::default().execute_with(|| {
 			const BUFFER_SIZE: usize = 300;
 			// Ensure that the capacity isn't dividable by `300`.
-			assert!(!STORAGE_INPUT_BUFFER_CAPACITY.is_multiple_of(BUFFER_SIZE), "Please update buffer size");
+			assert!(
+				!STORAGE_INPUT_BUFFER_CAPACITY.is_multiple_of(BUFFER_SIZE),
+				"Please update buffer size"
+			);
 			// Create some items where the last item is partially in the inner buffer so that
 			// we need to fill the buffer to read the entire item.
 			let data: Vec<Vec<u8>> = (0..=(STORAGE_INPUT_BUFFER_CAPACITY / BUFFER_SIZE))
@@ -640,7 +643,10 @@ mod tests {
 
 			const BUFFER_SIZE: usize = 300;
 			// Ensure that the capacity isn't dividable by `300`.
-			assert!(!STORAGE_INPUT_BUFFER_CAPACITY.is_multiple_of(BUFFER_SIZE), "Please update buffer size");
+			assert!(
+				!STORAGE_INPUT_BUFFER_CAPACITY.is_multiple_of(BUFFER_SIZE),
+				"Please update buffer size"
+			);
 			// Create some items where the last item is partially in the inner buffer so that
 			// we need to fill the buffer to read the entire item.
 			let data: Vec<Vec<u8>> = (0..=(STORAGE_INPUT_BUFFER_CAPACITY / BUFFER_SIZE))