refactor: update import paths and reorganize utility modules

core/utils/settings.py

@@ -0,0 +1,20 @@
+from core.network.aria2_integration import set_threads
+
+
+def restart_aria2c(aria2process):
+        import main # had to do this because of circle import :(
+        import signal
+        import atexit
+        main.kill_aria2server(aria2process)
+        aria2process.wait()
+        aria2process = main.run_aria2server()
+        signal.signal(signal.SIGINT, main.keyboardinterrupthandler)
+        atexit.unregister(main.kill_aria2server)
+        atexit.register(main.kill_aria2server, aria2process)
+
+def save_settings(thread_count, close, apiurl, aria2process):
+    global api_url
+    set_threads(thread_count)
+    api_url = apiurl
+    restart_aria2c(aria2process)
+    close()