Fix 9156 endian consistency (#9873)

- fixed #9156

# Description
I'm trying to fix the problems mentioned in the issue. It's my first
attempt in Rust. Please let me know if there are any problems.

# User-Facing Changes
- The `--little-endian` option dropped, replaced with `--endian`.
- Add the `--compact` option to the `into binary` command.
- `into int` accepts binary input

crates/nu-command/tests/commands/mod.rs

@@ -8,6 +8,7 @@ mod cal;
 mod cd;
 mod compact;
 mod continue_;
+mod conversions;
 mod cp;
 mod date;
 mod def;