App architecture modifications.

Now GUI and the app itself is divided into two different binaries.
The app also provides system tray icon.
Whereas the GUI can be used to configure the app.

gui/src-tauri/src/tauri_commands.rs

@@ -0,0 +1,27 @@
+// import DB related commands
+mod db;
+pub use db::*;
+
+// import RECORDER commands
+mod audio;
+pub use audio::*;
+
+// import PORCUPINE commands
+mod listener;
+pub use listener::*;
+
+// import SYS commands
+mod sys;
+pub use sys::*;
+
+// import VOICE commands
+mod voice;
+pub use voice::*;
+
+// import FS commands
+mod fs;
+pub use fs::*;
+
+// import ETC commands
+mod etc;
+pub use etc::*;