Incorrect folder remove when set `site-pkg-dir` and `assets-dir` at the same time and `site-pkg-dir` contains `/`

[ikai104]

When a project set both site-pkg-dir and asset-dir like this one:

[[workspace.metadata.leptos]]
site-pkg-dir = "static/pkg"  # set sub folder in here 
assets-dir = "assets"        # may contains some thing like `favicon.ico` and `static/my_image.png` and should not conflicted

The generated wasm & js will be removed due to following code:

cargo-leptos/src/compile/assets.rs

Lines 67 to 74 in 9bab0d7

	let pkg_dir_name = match pkg_dir.file_name() {
	Some(name) => name,
	None => {
	warn!("Assets No site-pkg-dir given, defaulting to 'pkg' for checks what to delete.");
	warn!("Assets This will probably delete already generated files.");
	"pkg"
	}
	};

cargo-leptos/src/compile/assets.rs

Lines 81 to 87 in 9bab0d7

	if entry.file_name() != pkg_dir_name {
	debug!(
	"Assets removing folder {}",
	GRAY.paint(path.to_string_lossy())
	);
	fs::remove_dir_all(path).await?;
	}