Add an option to move header on borders (#9796)

A patch to play with.
Need to make a few tests after all.

The question is what shall be done with `table.mode = none`, as it has
no borders.

```nu
$env.config.table.move_header = true
```


![image](https://github.com/nushell/nushell/assets/20165848/cdcffa6d-989c-4368-a436-fdf7d3400e31)

cc: @fdncred

---------

Signed-off-by: Maxim Zhiburt <zhiburt@gmail.com>

crates/nu-explore/src/nu_common/table.rs

@@ -1,6 +1,9 @@
 use nu_color_config::StyleComputer;
 use nu_protocol::{Span, Value};
-use nu_table::{value_to_clean_styled_string, value_to_styled_string, BuildConfig, ExpandedTable};
+use nu_table::{
+    common::{nu_value_to_string, nu_value_to_string_clean},
+    ExpandedTable, TableOpts,
+};
 use std::sync::atomic::AtomicBool;
 use std::sync::Arc;
 
@@ -18,9 +21,9 @@ pub fn try_build_table(
             try_build_map(cols, vals, span, style_computer, ctrlc, config)
         }
         val if matches!(val, Value::String { .. }) => {
-            value_to_clean_styled_string(&val, config, style_computer).0
+            nu_value_to_string_clean(&val, config, style_computer).0
         }
-        val => value_to_styled_string(&val, config, style_computer).0,
+        val => nu_value_to_string(&val, config, style_computer).0,
     }
 }
 
@@ -32,12 +35,19 @@ fn try_build_map(
     ctrlc: Option<Arc<AtomicBool>>,
     config: &NuConfig,
 ) -> String {
-    let opts = BuildConfig::new(ctrlc, config, style_computer, Span::unknown(), usize::MAX);
+    let opts = TableOpts::new(
+        config,
+        style_computer,
+        ctrlc,
+        Span::unknown(),
+        0,
+        usize::MAX,
+    );
     let result = ExpandedTable::new(None, false, String::new()).build_map(&cols, &vals, opts);
     match result {
         Ok(Some(result)) => result,
         Ok(None) | Err(_) => {
-            value_to_styled_string(&Value::Record { cols, vals, span }, config, style_computer).0
+            nu_value_to_string(&Value::Record { cols, vals, span }, config, style_computer).0
         }
     }
 }
@@ -49,13 +59,20 @@ fn try_build_list(
     span: Span,
     style_computer: &StyleComputer,
 ) -> String {
-    let opts = BuildConfig::new(ctrlc, config, style_computer, Span::unknown(), usize::MAX);
-    let result = ExpandedTable::new(None, false, String::new()).build_list(&vals, opts, 0);
+    let opts = TableOpts::new(
+        config,
+        style_computer,
+        ctrlc,
+        Span::unknown(),
+        0,
+        usize::MAX,
+    );
+    let result = ExpandedTable::new(None, false, String::new()).build_list(&vals, opts);
     match result {
         Ok(Some(out)) => out,
         Ok(None) | Err(_) => {
             // it means that the list is empty
-            value_to_styled_string(&Value::List { vals, span }, config, style_computer).0
+            nu_value_to_string(&Value::List { vals, span }, config, style_computer).0
         }
     }
 }