[NEW FEATURE] height resizeable panels

[jolsen-mitsu]

Right now the relative size of the panes is not user changeable.

It would be nice if there were key commands, setting file settings, and interactive mouse support to change the size of the panes, most notably the height.

For example, I have a lot of containers and I do not often use the logs pane. Even if I size the window really big, only a portion of my containers are visible, and the majority of the window is taken up by the logs section which is blank and wasted space in this scenario. I would love to be able to shrink the number of rows for the logs pane and increase the number of rows for the container pane. Possibly also shrink the height of the cpu/memory/ports section so I can give the containers pane the bulk of the window.

The panes would retain their relative sizes when the window is resized and may need to temporarily re-adjust pane size ratios if the user makes the window size very small.

It would be nice if this change can be done via shortcut keys, but also via mouse by clicking and dragging the pane frame (tmux supports this and may have implementation/code ideas to lean on)

It would be very nice if the changes were remembered between launches.