fix ranges over zero-length input (#15062)

Fixes #15061

# User-Facing Changes

Fixes panics when slicing empty input with inclusive ranges:

```nushell
> random binary 0 | bytes at 0..0
Error:   x Main thread panicked.
  |-> at crates/nu-protocol/src/value/range.rs:118:42
  `-> attempt to subtract with overflow
```

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

@@ -388,6 +388,13 @@ fn substring_by_negative_index() {
     })
 }
 
+#[test]
+fn substring_of_empty_string() {
+    let actual = nu!("'' | str substring ..0");
+    assert_eq!(actual.err, "");
+    assert_eq!(actual.out, "");
+}
+
 #[test]
 fn str_reverse() {
     let actual = nu!(r#"