Add ability to hide status bar (#39430)

This pull request adds the ability to configure the setting to hide or
show the status bar, as described in discussion:
https://github.com/zed-industries/zed/discussions/38591

The original [PR
#38974](https://github.com/zed-industries/zed/pull/38974#issuecomment-3362020879)
was merged but reverted due to hidden conflicts. As per @ConradIrwin 's
[request](https://github.com/zed-industries/zed/pull/38974#issuecomment-3362020879),
I am recreating the PR on top of updated main branch.

Release Notes:

- Added an experimental setting `"status_bar": { "experimental.show":
false}` to hide the status bars.

---------

Co-authored-by: Conrad Irwin <conrad.irwin@gmail.com>

crates/editor/src/editor_settings.rs

@@ -25,7 +25,6 @@ pub struct EditorSettings {
     pub lsp_highlight_debounce: u64,
     pub hover_popover_enabled: bool,
     pub hover_popover_delay: u64,
-    pub status_bar: StatusBar,
     pub toolbar: Toolbar,
     pub scrollbar: Scrollbar,
     pub minimap: Minimap,
@@ -67,18 +66,6 @@ pub struct Jupyter {
     pub enabled: bool,
 }
 
-#[derive(Clone, Debug, PartialEq, Eq)]
-pub struct StatusBar {
-    /// Whether to display the active language button in the status bar.
-    ///
-    /// Default: true
-    pub active_language_button: bool,
-    /// Whether to show the cursor position button in the status bar.
-    ///
-    /// Default: true
-    pub cursor_position_button: bool,
-}
-
 #[derive(Clone, Debug, PartialEq, Eq)]
 pub struct Toolbar {
     pub breadcrumbs: bool,
@@ -195,7 +182,6 @@ impl Settings for EditorSettings {
         let minimap = editor.minimap.unwrap();
         let gutter = editor.gutter.unwrap();
         let axes = scrollbar.axes.unwrap();
-        let status_bar = editor.status_bar.unwrap();
         let toolbar = editor.toolbar.unwrap();
         let search = editor.search.unwrap();
         let drag_and_drop_selection = editor.drag_and_drop_selection.unwrap();
@@ -208,10 +194,6 @@ impl Settings for EditorSettings {
             lsp_highlight_debounce: editor.lsp_highlight_debounce.unwrap(),
             hover_popover_enabled: editor.hover_popover_enabled.unwrap(),
             hover_popover_delay: editor.hover_popover_delay.unwrap(),
-            status_bar: StatusBar {
-                active_language_button: status_bar.active_language_button.unwrap(),
-                cursor_position_button: status_bar.cursor_position_button.unwrap(),
-            },
             toolbar: Toolbar {
                 breadcrumbs: toolbar.breadcrumbs.unwrap(),
                 quick_actions: toolbar.quick_actions.unwrap(),