Close other tabs feature on Mac.

Supporting command line, file menu and keybindings.
Default mac shortcut of `super + alt + o` (other)

Not able to test on Linux so excluding `close_other_tabs` from `gtk` for now
make a default short cut for close other tabs

src/input/Binding.zig

@@ -558,6 +558,12 @@ pub const Action = union(enum) {
     /// of the `confirm-close-surface` configuration setting.
     close_tab,
 
+    /// Close all tabs other than the currently focused one within the same
+    /// window.
+    ///
+    /// Only available on macOS currently.
+    close_other_tabs,
+
     /// Close the current window and all tabs and splits therein.
     ///
     /// This might trigger a close confirmation popup, depending on the value
@@ -1052,6 +1058,7 @@ pub const Action = union(enum) {
             .write_selection_file,
             .close_surface,
             .close_tab,
+            .close_other_tabs,
             .close_window,
             .toggle_maximize,
             .toggle_fullscreen,

src/input/command.zig

@@ -375,6 +375,12 @@ fn actionCommands(action: Action.Key) []const Command {
             .description = "Show the on-screen keyboard if present.",
         }},
 
+        .close_other_tabs => comptime &.{.{
+            .action = .close_other_tabs,
+            .title = "Close Other Tabs",
+            .description = "Close all tabs in this window except the current one.",
+        }},
+
         .open_config => comptime &.{.{
             .action = .open_config,
             .title = "Open Config",