REFACTOR: make input list a tiny bit tighter (#9115)

related to #8963
cc/ @melMass 

# Description
just a little refactoring attempt for `input list` 😌 

i wanted to refactor even more, but `Select`, `MultiSelect` and
`FuzzySelect` do not share a common trait, i could not find a nice way
to reduce the big `if` block...

# User-Facing Changes
```
$nothing
```

# Tests + Formatting
- 🟢 `toolkit fmt`
- 🟢 `toolkit clippy`
- ⚫ `toolkit test`
- ⚫ `toolkit test stdlib`

# After Submitting
```
$nothing
```

crates/nu-command/src/platform/input/list.rs

@@ -127,6 +127,13 @@ impl Command for InputList {
             });
         }
 
+        if call.has_flag("multi") && call.has_flag("fuzzy") {
+            return Err(ShellError::TypeMismatch {
+                err_message: "Fuzzy search is not supported for multi select".to_string(),
+                span: head,
+            });
+        }
+
         // could potentially be used to map the use theme colors at some point
         // let theme = dialoguer::theme::ColorfulTheme {
         //     active_item_style: Style::new().fg(Color::Cyan).bold(),
@@ -134,12 +141,6 @@ impl Command for InputList {
         // };
 
         let ans: InteractMode = if call.has_flag("multi") {
-            if call.has_flag("fuzzy") {
-                return Err(ShellError::TypeMismatch {
-                    err_message: "Fuzzy search is not supported for multi select".to_string(),
-                    span: head,
-                });
-            } else {
             let mut multi_select = MultiSelect::new(); //::with_theme(&theme);
 
             InteractMode::Multi(
@@ -153,7 +154,6 @@ impl Command for InputList {
                 .interact_on_opt(&Term::stderr())
                 .map_err(|err| ShellError::IOError(format!("{}: {}", INTERACT_ERROR, err)))?,
             )
-            }
         } else if call.has_flag("fuzzy") {
             let mut fuzzy_select = FuzzySelect::new(); //::with_theme(&theme);
 
@@ -185,9 +185,8 @@ impl Command for InputList {
             )
         };
 
-        match ans {
+        Ok(match ans {
-            InteractMode::Multi(res) => Ok({
+            InteractMode::Multi(res) => match res {
-                match res {
                 Some(opts) => Value::List {
                     vals: opts.iter().map(|s| options[*s].value.clone()).collect(),
                     span: head,
@@ -196,21 +195,16 @@ impl Command for InputList {
                     vals: vec![],
                     span: head,
                 },
-                }
+            },
-            }
+            InteractMode::Single(res) => match res {
-            .into_pipeline_data()),
-            InteractMode::Single(res) => Ok({
-                match res {
                 Some(opt) => options[opt].value.clone(),
-
                 None => Value::String {
                     val: "".to_string(),
                     span: head,
                 },
+            },
         }
-            }
+        .into_pipeline_data())
-            .into_pipeline_data()),
-        }
     }
 
     fn examples(&self) -> Vec<Example> {