feat: Add total size to header bar and change to aggregate, human-readable item count.

This changes the display from `(2034 items)` to
`(2k items, 213 MB)`, providing an overview of the total amount
of storage used along with the total amount of files on a particular
hiearchy level.

1 files changed, 1 insertions, 0 deletions

diff --git a/Cargo.toml b/Cargo.toml
index 8370b42..817b94c 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -39,6 +39,7 @@ open = { version = "5.0", optional = true }
 wild = "2.0.4"
 owo-colors = "3.5.0"
 human_format = "1.0.3"
+once_cell = "1.19"
 
 [[bin]]
 name="dua"