general: Consolidate explicit dependencies down to adw and gtk4

Use the exported dependencies for everything else.

src/main.rs

@@ -18,7 +18,7 @@
 // SPDX-License-Identifier: GPL-3.0-or-later
 
 use gettextrs::*;
-use gio::prelude::*;
+use gtk::gio::{self, prelude::*};
 
 mod application;
 mod config;
@@ -26,6 +26,10 @@ mod util;
 mod widgets;
 mod window;
 
+mod deps {
+    pub use gtk::{gdk, gdk_pixbuf, gio, glib, graphene};
+}
+
 use application::LpApplication;
 
 fn main() {