add pretty/si-unit byte size parsing/printing utils

Signed-off-by: Jason Volk <jason@zemos.net>

Cargo.lock

@@ -458,6 +458,12 @@ version = "1.8.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9ac0150caa2ae65ca5bd83f25c7de183dea78d4d366469f148435e2acfbad0da"
 
+[[package]]
+name = "bytesize"
+version = "1.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a3e368af43e418a04d52505cf3dbc23dda4e3407ae2fa99fd0e4f308ce546acc"
+
 [[package]]
 name = "bzip2-sys"
 version = "0.1.11+1.0.8"
@@ -683,6 +689,7 @@ dependencies = [
  "arrayvec",
  "axum",
  "bytes",
+ "bytesize",
  "cargo_toml",
  "checked_ops",
  "chrono",