FR: Support flexibly shelving devices placed on open shelves #3213

Problem

I have an Xbox Series X, an HP gen7 microserver, a few IOT hubs, a consumer router and consumer modem. Of these, closest to having a standard width is the HP microserver. Some of these are also way shallowed than half-depth, and will be stacked behind each other to save on space on the shelves

I'm currently pretending they're half-rack sized (though Xbox Series X is vaguely 2/3rd of a 19" rack), and I have not added the Philips Hue hub, SmartThings hub, ISP's modem, TP-Link TL-WDR4300, Ubiquiti MPower smart power outlet strips, etc. because there's no clear way to add them into the Rackula-specified rack. These are very much not natively rackable devices unless I 3D print something, and these shelves will serve only to isolate them from the rest of the house.

These devices will also still use the rest of the rack's mechanisms: cabling, power, etc. so once that UI is clear and stable in Rackula, I'd like to use it.

Proposed solution

• Allow defining shelves that accept variable height and variable width devices (e.g. 'flexible shelf' and 'flexible device').
• In variable height shelves, accept stacking devices on top of devices (no matter width of the device).
• In variable height shelves, allow putting a device behind another device, and add a per-shelf top-view.

Alternatives considered

No response

How important is this to you?

Would significantly improve my workflow