Add an animation timeout (#659)

* added animation timeout

* Updated animation timeout to u12

* updated config comment to reflect the new range for animation timeout

src/config/Config.zig

@@ -57,3 +57,4 @@ brightness_down_key: []const u8 = "F5",
 brightness_up_key: []const u8 = "F6",
 brightnessctl: []const u8 = "/usr/bin/brightnessctl",
 brightness_change: []const u8 = "10",
+animation_timeout_sec: u12 = 0,