Add default-tiled-position

[alicealysia]

currently when you open a new tiled window, it always spawns to the right of the currently focused window. I think it would be nice to have the option to change this behavior. Some possibilities are:

before-focused-column - adds the window to a new column before the focused column

after-focused-column - adds the window to a new column after the focused column (current behaviour)

above-focused-window - adds the window to the same column as the focused window, positioning it above it

below-focused-window - adds the window to the same column as the focused window, positioning it above it

mouse-direction-from-focus - chooses one of the above options depending on where the mouse is positioned relative to the focused window (e.g. if the mouse is to the right of the focused window, it will choose "after-focused-column")

to-end - adds the window to the end of the carousel

to-beginning - adds the window to the beginning of the carousel

[YaLTeR]

Related: #1125. The main question is when you would want to use this. I think we need to enumerate actual use-cases here to avoid adding 20 ways to configure this that nobody will realistically use (for example, I doubt anyone needs a global setting for unconditional below-focused-window).

mouse-direction-from-focus - chooses one of the above options depending on where the mouse is positioned relative to the focused window (e.g. if the mouse is to the right of the focused window, it will choose "after-focused-column")

For this one specifically I don't think it will feel good to use, I think it will feel random.

[alicealysia]

So, the usecase is something similar to hyprland or glazewm where you can open a new tile above, below, or to the side of the tile you're currently hovering over based on where the cursor is positioned.

Honestly, that is the one setting I actually want, as it makes your window management nice and predictable. Opening left of the current window also strikes me as a good option for rtl users.

So, to summarise;

Instead of relative to cursor and focus, just do relative to cursor

Adding to the columns by default I'm iffy on, but left of the current column it probably worth adding to rtl.