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/mod.rs

@@ -82,7 +82,6 @@ mod print;
 #[cfg(feature = "sqlite")]
 mod query;
 mod random;
-mod range;
 mod redirection;
 mod reduce;
 mod reject;
@@ -100,6 +99,7 @@ mod seq;
 mod seq_char;
 mod seq_date;
 mod skip;
+mod slice;
 mod sort;
 mod sort_by;
 mod source_env;