Seq for nushell (#2704)

* seq command - WIP

* why, oh why

* works with parameters

* widths should've been optional

* dbg messages

* working. rest had to be first.

* updated so that it outputs a table instead of just strings

* made to work with floats, allowed separator be more than 1 char

* clippy

* fixed tests

* changed terminator help desc

* commit to get ci moving again

crates/nu-cli/src/cli.rs

@@ -278,6 +278,7 @@ pub fn create_default_context(interactive: bool) -> Result<EvaluationContext, Bo
             whole_stream_command(UrlPath),
             whole_stream_command(UrlHost),
             whole_stream_command(UrlQuery),
+            whole_stream_command(Seq),
         ]);
 
         #[cfg(feature = "clipboard-cli")]