Add cursor shape configuration for each edit mode (#7745)

# Description

This PR allows the configuration of cursor shapes in nushell for each
edit mode. This is the change that is in the default_config.nu file.
```
  cursor_shape: {
    emacs: line # block, underscore, line (line is the default)
    vi_insert: block # block, underscore, line (block is the default)
    vi_normal: underscore # block, underscore, line  (underscore is the default)
  }
```

# User-Facing Changes

See above. If you'd prefer a different default, please speak up and let
us know.

# Tests + Formatting

Don't forget to add tests that cover your changes.

Make sure you've run and fixed any issues with these commands:

- `cargo fmt --all -- --check` to check standard code formatting (`cargo
fmt --all` applies these changes)
- `cargo clippy --workspace -- -D warnings -D clippy::unwrap_used -A
clippy::needless_collect` to check that you're using the standard code
style
- `cargo test --workspace` to check that all tests pass

# After Submitting

If your PR had any user-facing changes, update [the
documentation](https://github.com/nushell/nushell.github.io) after the
PR is merged, if necessary. This will help us keep the docs up to date.

crates/nu-cli/src/prompt.rs

@@ -105,7 +105,7 @@ impl Prompt for NushellPrompt {
         if let Some(prompt_string) = &self.left_prompt_string {
             prompt_string.replace('\n', "\r\n").into()
         } else {
-            let default = DefaultPrompt::new();
+            let default = DefaultPrompt::default();
             default
                 .render_prompt_left()
                 .to_string()
@@ -118,7 +118,7 @@ impl Prompt for NushellPrompt {
         if let Some(prompt_string) = &self.right_prompt_string {
             prompt_string.replace('\n', "\r\n").into()
         } else {
-            let default = DefaultPrompt::new();
+            let default = DefaultPrompt::default();
             default
                 .render_prompt_right()
                 .to_string()

crates/nu-cli/src/repl.rs

@@ -5,6 +5,7 @@ use crate::{
     util::{eval_source, get_guaranteed_cwd, report_error, report_error_new},
     NuHighlighter, NuValidator, NushellPrompt,
 };
+use crossterm::cursor::CursorShape;
 use log::{info, trace, warn};
 use miette::{IntoDiagnostic, Result};
 use nu_color_config::StyleComputer;
@@ -12,11 +13,12 @@ use nu_engine::{convert_env_values, eval_block, eval_block_with_early_return};
 use nu_parser::{lex, parse, trim_quotes_str};
 use nu_protocol::{
     ast::PathMember,
+    config::NuCursorShape,
     engine::{EngineState, ReplOperation, Stack, StateWorkingSet},
     format_duration, BlockId, HistoryFileFormat, PipelineData, PositionalArg, ShellError, Span,
     Spanned, Type, Value, VarId,
 };
-use reedline::{DefaultHinter, EditCommand, Emacs, SqliteBackedHistory, Vi};
+use reedline::{CursorConfig, DefaultHinter, EditCommand, Emacs, SqliteBackedHistory, Vi};
 use std::{
     io::{self, Write},
     sync::atomic::Ordering,
@@ -174,6 +176,18 @@ pub fn evaluate_repl(
 
         info!("update reedline {}:{}:{}", file!(), line!(), column!());
         let engine_reference = std::sync::Arc::new(engine_state.clone());
+
+        // Find the configured cursor shapes for each mode
+        let cursor_config = CursorConfig {
+            vi_insert: Some(map_nucursorshape_to_cursorshape(
+                config.cursor_shape_vi_insert,
+            )),
+            vi_normal: Some(map_nucursorshape_to_cursorshape(
+                config.cursor_shape_vi_normal,
+            )),
+            emacs: Some(map_nucursorshape_to_cursorshape(config.cursor_shape_emacs)),
+        };
+
         line_editor = line_editor
             .with_highlighter(Box::new(NuHighlighter {
                 engine_state: engine_reference.clone(),
@@ -188,7 +202,8 @@ pub fn evaluate_repl(
             )))
             .with_quick_completions(config.quick_completions)
             .with_partial_completions(config.partial_completions)
-            .with_ansi_colors(config.use_ansi_coloring);
+            .with_ansi_colors(config.use_ansi_coloring)
+            .with_cursor_config(cursor_config);
 
         let style_computer = StyleComputer::from_config(engine_state, stack);
 
@@ -535,6 +550,14 @@ pub fn evaluate_repl(
     Ok(())
 }
 
+fn map_nucursorshape_to_cursorshape(shape: NuCursorShape) -> CursorShape {
+    match shape {
+        NuCursorShape::Block => CursorShape::Block,
+        NuCursorShape::UnderScore => CursorShape::UnderScore,
+        NuCursorShape::Line => CursorShape::Line,
+    }
+}
+
 fn get_banner(engine_state: &mut EngineState, stack: &mut Stack) -> String {
     let age = match eval_string_with_input(
         engine_state,