Rustyline bug fixes (#3916)

* Mitigate history file bug in Rustyline

Rustyline's duplicate ignoring code has a bug that can cause data loss and
history file corruption. Testing seems to indicate that disabling this behavior
and allowing duplicates will prevent the bug from showing up. Many people have
complained about this issue, I think it is worthwhile to fix the bug at the cost
of permitting duplicate history entries.

Upstream bug: https://github.com/kkawakam/rustyline/issues/559

* Increase Rustyline historyfile limit

Rustyline will only store 100 history items by default. This is quite a small
limit for a shell that people use as a daily driver. Especially when the
deduplication code is removed, we will hit that limit quickly and start to lose
history. This commit bumps the limit up to 10k. We can discuss if this is an
inappropriate limit or if we should allow users to specify this setting in their
nushell config file instead.

crates/nu-cli/src/line_editor.rs

@@ -76,6 +76,8 @@ pub fn default_rustyline_editor_configuration() -> Editor<Helper> {
     let config = Config::builder()
         .check_cursor_position(true)
         .color_mode(ColorMode::Forced)
+        .history_ignore_dups(false)
+        .max_history_size(10_000)
         .build();
     let mut rl: Editor<_> = Editor::with_config(config);