Add --show-size flag to ouch list (#1005)

[ChrisJr404]

This adds the --show-size flag to ouch list that was asked for in #1005, so you can see how big each entry is without extracting anything.

The sizes come straight from the archive metadata (tar/zip/7z/rar all report the uncompressed size per entry), so the plain ouch list output is byte-for-byte the same as before and you only get the extra column when you pass the flag. Files show a right-aligned size using the same BytesFmt the rest of ouch uses; directories get a blank, aligned column so things line up. It works in --tree mode too, with the size column sitting to the left of the branches.

$ ouch list proj.tar.gz --show-size
Archive: "proj.tar.gz"
            proj/
 12.00   B  proj/README.md
            proj/src/
  2.00   B  proj/src/tiny.txt
  3.00 kiB  proj/src/big.bin

Added an integration test covering both the flag and the unchanged default output.

[marcospb19]

Great code and great PR, thanks.

Cause I merged older PRs before, now you have conflicts, just 1 nitpick the rest is perfect.

[marcospb19]

Small nitpick from me:

Suggested change

	match (file_type, size) {
	(ListFileType::File | ListFileType::Symlink { .. } | ListFileType::Hardlink { .. }, Some(size)) => {
	let _ = write!(out, "{} ", BytesFmt(size));
	}
	_ => {
	// `BytesFmt` renders as 10 columns, keep the padding in sync with it.
	let _ = write!(out, "{:>10} ", "");
	}
	}
	if let Some(size) = size
	&& !matches!(file_type, ListFileType::Directory { .. })
	{
	let _ = write!(out, "{} ", BytesFmt(size));
	} else {
	// `BytesFmt` renders as 10 columns, keep the padding in sync with it.
	let _ = write!(out, "{:>10} ", "");
	}

[ChrisJr404]

Thanks! Applied your nitpick (the if let Some(size) = size && !matches!(file_type, ListFileType::Directory) form; dropped the { .. } since Directory is a unit variant, which clippy also prefers).

I also merged main to resolve the conflicts with the recently-merged --depth work. --show-size and --depth now compose: the size column is rendered inside the depth-limited traversal in both flat and tree views. Build, fmt, clippy, and both the list_show_size and list_depth integration tests pass locally.