Rewrite the ps command

src/commands/ps.rs

@@ -1,17 +0,0 @@
-use crate::errors::ShellError;
-use crate::object::process::process_dict;
-use crate::prelude::*;
-use sysinfo::{RefreshKind, SystemExt};
-
-pub fn ps(args: CommandArgs, _registry: &CommandRegistry) -> Result<OutputStream, ShellError> {
-    let mut system = sysinfo::System::new_with_specifics(RefreshKind::new().with_processes());
-    system.refresh_processes();
-    let list = system.get_process_list();
-
-    let list = list
-        .into_iter()
-        .map(|(_, process)| process_dict(process, Tag::unknown_origin(args.call_info.name_span)))
-        .collect::<VecDeque<_>>();
-
-    Ok(list.from_input_stream())
-}