[FR] Layout Mode (e.g. Mind Map)

[PennHui666]

Issue Summary

Regarding the application of the "mind map" mode in canvas, there are already projects that have made relevant features.
Obsidian-Canvas-MindMap

• Press Enter to create brother card;
• Press Tab to create child card;
• Delete card to rearrange layout automatically;
• Press Alt + ←/→/↓/↑ to navigate between cards;
• Press Cmd / Ctrl + ←/→/↓/↑ to create floating cards;

But it’s not enough. I think this project can further enhance the idea of displaying the canvas mind map mode by emulating the collapsing/expanding features implemented on v2.6.0-beta.1.

Feature Description

• Collapse of child nodes by clicking the expand (⊕) or collapse (⊖) symbols next to the father node.
• Display the number of collapsed child nodes after collapse

Example

[PennHui666]

btw，maybe it would be simpler to do this by double-clicking the connection point on the card, rather than adding another icon,if this is possible.

[net-frog]

I am using groups to simulate this, but there is one small problem that if folded and move close to other folded group and if unfolded they overlap with other group. Maybe, when unfolding if there are other cards or group it should be moved automatically.