feat: Implement Context Menu actions and Add Torrent modal

- Implemented Start, Stop, Delete actions in context menu using backend API.
- Replaced  with manual  implementation for context menu reliability.
- Added  for adding torrents via Magnet Link/URL.
- Integrated Add Torrent feature into the Toolbar.

frontend/src/components/torrent/mod.rs

@@ -1 +1,2 @@
 pub mod table;
+pub mod add_torrent;