refactor: attempted autoupdate configuration

src/config/Config.zig

@@ -1462,6 +1462,13 @@ term: []const u8 = "xterm-ghostty",
 /// running. Defaults to an empty string if not set.
 @"enquiry-response": []const u8 = "",
 
+/// This controls the automatic update functionality on macOS by setting the
+/// properties on the Squirrel automatic update component. By default this is
+/// set to "off" which doesn't do anything. The "check" option will automatically
+/// check for updates but will NOT download them, while as the "download" option
+/// will both check AND download updates automatically for the user.
+@"auto-updates": AutoUpdates = .off,
+
 /// This is set by the CLI parser for deinit.
 _arena: ?ArenaAllocator = null,
 
@@ -4096,6 +4103,13 @@ pub const LinuxCgroup = enum {
     @"single-instance",
 };
 
+/// See auto-updates
+pub const AutoUpdates = enum {
+    check,
+    download,
+    off,
+};
+
 pub const Duration = struct {
     /// Duration in nanoseconds
     duration: u64 = 0,