Implement basic desktop app with chromium embeded framework (#2874)

* Remove tauri based desktop app

* Allow bzip-1.0.6 license

* Implement basic cef based desktop app

* Cleanup build setup

* Use wait until and execute cef loop more frequently

* Remove custom do browser work event

* Move WinitApp into its own module

* Cleanup event handling

* Cleanup + Scheudule cef message loop work

* Fix cpu overheating on idle: https://xkcd.com/1172/

* Use tracing crate for logging instead of println

* Rebase to main

---------

Co-authored-by: Dennis Kobert <dennis@kobert.dev>

desktop/src/cef/internal/client.rs

@@ -0,0 +1,52 @@
+use cef::rc::{Rc, RcImpl};
+use cef::sys::{_cef_client_t, cef_base_ref_counted_t};
+use cef::{ImplClient, RenderHandler, WrapClient};
+
+pub(crate) struct ClientImpl {
+	object: *mut RcImpl<_cef_client_t, Self>,
+	render_handler: RenderHandler,
+}
+impl ClientImpl {
+	pub(crate) fn new(render_handler: RenderHandler) -> Self {
+		Self {
+			object: std::ptr::null_mut(),
+			render_handler,
+		}
+	}
+}
+
+impl ImplClient for ClientImpl {
+	fn render_handler(&self) -> Option<RenderHandler> {
+		Some(self.render_handler.clone())
+	}
+
+	fn get_raw(&self) -> *mut _cef_client_t {
+		self.object.cast()
+	}
+}
+
+impl Clone for ClientImpl {
+	fn clone(&self) -> Self {
+		unsafe {
+			let rc_impl = &mut *self.object;
+			rc_impl.interface.add_ref();
+		}
+		Self {
+			object: self.object,
+			render_handler: self.render_handler.clone(),
+		}
+	}
+}
+impl Rc for ClientImpl {
+	fn as_base(&self) -> &cef_base_ref_counted_t {
+		unsafe {
+			let base = &*self.object;
+			std::mem::transmute(&base.cef_object)
+		}
+	}
+}
+impl WrapClient for ClientImpl {
+	fn wrap_rc(&mut self, object: *mut RcImpl<_cef_client_t, Self>) {
+		self.object = object;
+	}
+}