Add a way to configure default search options (#17179)

Closes https://github.com/zed-industries/zed/issues/4646

```json
// Search options to enable by default when opening new project and buffer searches.
"search": {
  "whole_word": false,
  "case_sensitive": false,
  "include_ignored": false,
  "regex": false
}
```

Release Notes:

- Added `search` settings section to configure default options enabled
in buffer and project searches
([#4646](https://github.com/zed-industries/zed/issues/4646))

---------

Co-authored-by: Kirill Bulatov <mail4score@gmail.com>

crates/search/src/project_search.rs

@@ -668,7 +668,9 @@ impl ProjectSearchView {
         let (mut options, filters_enabled) = if let Some(settings) = settings {
             (settings.search_options, settings.filters_enabled)
         } else {
-            (SearchOptions::NONE, false)
+            let search_options =
+                SearchOptions::from_settings(&EditorSettings::get_global(cx).search);
+            (search_options, false)
         };
 
         {
@@ -3537,7 +3539,7 @@ pub mod tests {
             editor::init(cx);
             workspace::init_settings(cx);
             Project::init_settings(cx);
-            super::init(cx);
+            crate::init(cx);
         });
     }