What I am looking for is a way to:
move left pane to right,
move bottom right pane to top left corner etc.
The method I use to move windows around is similar to what I do with text -- "d" the window, then "p" it elsewhere. Except the mappings are <c-w>d and <c-w>p: https://github.com/andrewradev/yankwin.vim
If you wanted to use the mouse, you could map <LeftMouse>, <MiddleMouse>, and <RightMouse> for it. Possibly with ctrl or some other modifier. There's even <LeftDrag>, but I haven't experimented with it, so I can't say if it would be easy to implement drag & drop for windows. :help mouse-overview.
The method I use to move windows around is similar to what I do with text -- "d" the window, then "p" it elsewhere. Except the mappings are
<c-w>dand<c-w>p: https://github.com/andrewradev/yankwin.vimI doubt this plugin would be convenient to you out of the box, since for instance it doesn't paste vertical splits, and if you have lots of windows, maybe you use a large monitor with them. I'd say you could use it as an idea at least. The core of it is as simple as this: https://github.com/AndrewRadev/vim-lectures/blob/4bb97b3a2cb27fb8542d494079ee2ffde4a49d93/snippets/03-winmove.vim
If you wanted to use the mouse, you could map
<LeftMouse>,<MiddleMouse>, and<RightMouse>for it. Possibly with ctrl or some other modifier. There's even<LeftDrag>, but I haven't experimented with it, so I can't say if it would be easy to implement drag & drop for windows.:help mouse-overview.