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/editor/src/editor.rs

@@ -59,7 +59,9 @@ use convert_case::{Case, Casing};
 use debounced_delay::DebouncedDelay;
 use display_map::*;
 pub use display_map::{DisplayPoint, FoldPlaceholder};
-pub use editor_settings::{CurrentLineHighlight, EditorSettings, ScrollBeyondLastLine};
+pub use editor_settings::{
+    CurrentLineHighlight, EditorSettings, ScrollBeyondLastLine, SearchSettings,
+};
 pub use editor_settings_controls::*;
 use element::LineWithInvisibles;
 pub use element::{

crates/editor/src/editor_settings.rs

@@ -28,6 +28,8 @@ pub struct EditorSettings {
     #[serde(default)]
     pub double_click_in_multibuffer: DoubleClickInMultibuffer,
     pub search_wrap: bool,
+    #[serde(default)]
+    pub search: SearchSettings,
     pub auto_signature_help: bool,
     pub show_signature_help_after_edits: bool,
     pub jupyter: Jupyter,
@@ -156,6 +158,40 @@ pub enum ScrollBeyondLastLine {
     VerticalScrollMargin,
 }
 
+/// Default options for buffer and project search items.
+#[derive(Copy, Clone, Default, Debug, Serialize, Deserialize, JsonSchema, PartialEq, Eq)]
+pub struct SearchSettings {
+    #[serde(default)]
+    pub whole_word: bool,
+    #[serde(default)]
+    pub case_sensitive: bool,
+    #[serde(default)]
+    pub include_ignored: bool,
+    #[serde(default)]
+    pub regex: bool,
+}
+
+#[derive(Clone, Default, Serialize, Deserialize, JsonSchema, Debug)]
+pub struct SearchSettingsContent {
+    pub whole_word: Option<bool>,
+    pub case_sensitive: Option<bool>,
+    pub include_ignored: Option<bool>,
+    pub regex: Option<bool>,
+}
+
+impl Settings for SearchSettings {
+    const KEY: Option<&'static str> = Some("search");
+
+    type FileContent = SearchSettingsContent;
+
+    fn load(
+        sources: SettingsSources<Self::FileContent>,
+        _: &mut gpui::AppContext,
+    ) -> anyhow::Result<Self> {
+        sources.json_merge()
+    }
+}
+
 #[derive(Clone, Default, Serialize, Deserialize, JsonSchema)]
 pub struct EditorSettingsContent {
     /// Whether the cursor blinks in the editor.
@@ -251,6 +287,11 @@ pub struct EditorSettingsContent {
     /// Default: true
     pub search_wrap: Option<bool>,
 
+    /// Defaults to use when opening a new buffer and project search items.
+    ///
+    /// Default: nothing is enabled
+    pub search: Option<SearchSettings>,
+
     /// Whether to automatically show a signature help pop-up or not.
     ///
     /// Default: false