[BUG] Dependency on Mouse Cursor for dumping outputs

[bibekyess]

Current Status: While replacing the selected contents with the AI output, it looks for the mouse cursor's initial position to track where to paste the output, so you need to make sure your mouse is inside the text-editor when you press the Keyboard Shortcut.

This is a risky design because generally people opens multiple windows to work concurrently and mouse cursor position is not reliable. Also, developers likes using keyboard only, so we should find other reliable way to get the editor window.

[bibekyess]

One backup-safe design is to generate output in BAssist's own window and ask user to just press ctrl/cmd + v [paste] in their original editor