Remove ListStream type (#14425)

# Description
List values and list streams have the same type (`list<>`). Rather,
streaming is a separate property of the pipeline/command output. This PR
removes the unnecessary `ListStream` type.

# User-Facing Changes
Should be none, except `random dice` now has a more specific output
type.

crates/nu-command/src/database/commands/into_sqlite.rs

@@ -359,7 +359,6 @@ fn nu_value_to_sqlite_type(val: &Value) -> Result<&'static str, ShellError> {
         | Type::Custom(_)
         | Type::Error
         | Type::List(_)
-        | Type::ListStream
         | Type::Range
         | Type::Record(_)
         | Type::Signature

crates/nu-command/src/random/dice.rs

@@ -12,7 +12,7 @@ impl Command for SubCommand {
 
     fn signature(&self) -> Signature {
         Signature::build("random dice")
-            .input_output_types(vec![(Type::Nothing, Type::ListStream)])
+            .input_output_types(vec![(Type::Nothing, Type::list(Type::Int))])
             .allow_variants_without_examples(true)
             .named(
                 "dice",

crates/nu-command/src/system/nu_check.rs

@@ -15,7 +15,6 @@ impl Command for NuCheck {
         Signature::build("nu-check")
             .input_output_types(vec![
                 (Type::String, Type::Bool),
-                (Type::ListStream, Type::Bool),
                 (Type::List(Box::new(Type::Any)), Type::Bool),
             ])
             // type is string to avoid automatically canonicalizing the path

crates/nu-parser/src/type_check.rs

@@ -29,8 +29,6 @@ pub fn type_compatible(lhs: &Type, rhs: &Type) -> bool {
 
     match (lhs, rhs) {
         (Type::List(c), Type::List(d)) => type_compatible(c, d),
-        (Type::ListStream, Type::List(_)) => true,
-        (Type::List(_), Type::ListStream) => true,
         (Type::List(c), Type::Table(table_fields)) => {
             if matches!(**c, Type::Any) {
                 return true;

crates/nu-protocol/src/pipeline/pipeline_data.rs

@@ -109,7 +109,7 @@ impl PipelineData {
     /// than would be returned by [`Value::get_type()`] on the result of
     /// [`.into_value()`](Self::into_value).
     ///
-    /// Specifically, a `ListStream` results in [`list stream`](Type::ListStream) rather than
+    /// Specifically, a `ListStream` results in `list<any>` rather than
     /// the fully complete [`list`](Type::List) type (which would require knowing the contents),
     /// and a `ByteStream` with [unknown](crate::ByteStreamType::Unknown) type results in
     /// [`any`](Type::Any) rather than [`string`](Type::String) or [`binary`](Type::Binary).
@@ -117,7 +117,7 @@ impl PipelineData {
         match self {
             PipelineData::Empty => Type::Nothing,
             PipelineData::Value(value, _) => value.get_type(),
-            PipelineData::ListStream(_, _) => Type::ListStream,
+            PipelineData::ListStream(_, _) => Type::list(Type::Any),
             PipelineData::ByteStream(stream, _) => stream.type_().into(),
         }
     }

crates/nu-protocol/src/ty.rs

@@ -23,7 +23,6 @@ pub enum Type {
     Float,
     Int,
     List(Box<Type>),
-    ListStream,
     #[default]
     Nothing,
     Number,
@@ -121,7 +120,6 @@ impl Type {
             Type::Nothing => SyntaxShape::Nothing,
             Type::Record(entries) => SyntaxShape::Record(mk_shape(entries)),
             Type::Table(columns) => SyntaxShape::Table(mk_shape(columns)),
-            Type::ListStream => SyntaxShape::List(Box::new(SyntaxShape::Any)),
             Type::Any => SyntaxShape::Any,
             Type::Error => SyntaxShape::Any,
             Type::Binary => SyntaxShape::Binary,
@@ -151,7 +149,6 @@ impl Type {
             Type::Nothing => String::from("nothing"),
             Type::Number => String::from("number"),
             Type::String => String::from("string"),
-            Type::ListStream => String::from("list-stream"),
             Type::Any => String::from("any"),
             Type::Error => String::from("error"),
             Type::Binary => String::from("binary"),
@@ -209,7 +206,6 @@ impl Display for Type {
             Type::Nothing => write!(f, "nothing"),
             Type::Number => write!(f, "number"),
             Type::String => write!(f, "string"),
-            Type::ListStream => write!(f, "list-stream"),
             Type::Any => write!(f, "any"),
             Type::Error => write!(f, "error"),
             Type::Binary => write!(f, "binary"),

crates/nu_plugin_example/src/commands/for_each.rs

@@ -23,7 +23,7 @@ impl PluginCommand for ForEach {
 
     fn signature(&self) -> Signature {
         Signature::build(self.name())
-            .input_output_type(Type::ListStream, Type::Nothing)
+            .input_output_type(Type::list(Type::Any), Type::Nothing)
             .required(
                 "closure",
                 SyntaxShape::Closure(Some(vec![SyntaxShape::Any])),

crates/nu_plugin_example/src/commands/generate.rs

@@ -26,7 +26,7 @@ impl PluginCommand for Generate {
 
     fn signature(&self) -> Signature {
         Signature::build(self.name())
-            .input_output_type(Type::Nothing, Type::ListStream)
+            .input_output_type(Type::Nothing, Type::list(Type::Any))
             .required(
                 "initial",
                 SyntaxShape::Any,