Rename/deprecate range to slice (#14825)

# Description
As the `range` command has an ambiguous name (does it construct a range
type?, does it iterate a range like `seq`) replace it with a more
descriptive verb of what it does: `slice`

Closes #14130
# User-Facing Changes
`range` is now deprecated and replaced in whole by `slice` with the same
behavior.
`range` will be removed in `0.103.0`

# Tests + Formatting
Tests have been updated to use `slice`

# After submitting

- [ ] prepare PR for `nu_scripts` (several usages of `range` to be
fixed)
- [ ] update documentation usages of `range` after release

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

@@ -0,0 +1,68 @@
+use nu_test_support::fs::Stub::EmptyFile;
+use nu_test_support::playground::Playground;
+use nu_test_support::{nu, pipeline};
+
+#[test]
+fn selects_a_row() {
+    Playground::setup("slice_test_1", |dirs, sandbox| {
+        sandbox.with_files(&[EmptyFile("notes.txt"), EmptyFile("tests.txt")]);
+
+        let actual = nu!(
+            cwd: dirs.test(), pipeline(
+            "
+                ls
+                | sort-by name
+                | slice 0..0
+                | get name.0
+            "
+        ));
+
+        assert_eq!(actual.out, "notes.txt");
+    });
+}
+
+#[test]
+fn selects_some_rows() {
+    Playground::setup("slice_test_2", |dirs, sandbox| {
+        sandbox.with_files(&[
+            EmptyFile("notes.txt"),
+            EmptyFile("tests.txt"),
+            EmptyFile("persons.txt"),
+        ]);
+
+        let actual = nu!(
+            cwd: dirs.test(), pipeline(
+            "
+                ls
+                | get name
+                | slice 1..2
+                | length
+            "
+        ));
+
+        assert_eq!(actual.out, "2");
+    });
+}
+
+#[test]
+fn negative_indices() {
+    Playground::setup("slice_test_negative_indices", |dirs, sandbox| {
+        sandbox.with_files(&[
+            EmptyFile("notes.txt"),
+            EmptyFile("tests.txt"),
+            EmptyFile("persons.txt"),
+        ]);
+
+        let actual = nu!(
+            cwd: dirs.test(), pipeline(
+            "
+                ls
+                | get name
+                | slice (-1..)
+                | length
+            "
+        ));
+
+        assert_eq!(actual.out, "1");
+    });
+}