Allow to make spaces for another subspaces (recursive) and to get into nested space.

[Maniues]

Describe the problem

Currently, to the Matrix space (let's name it LivingRoom) I can add one subspace (I will name it Foo), but I cannot add another subspace (Bar) for the Foo. I can create Bar for LivingRoom but not for Foo.

Describe the solution you'd like

I propose adding the feature to create many nested spaces.
It can be a button next to “Add room”.

I also suggest the feature to get into the subspace (Foo in this example) directly. Like you pin this and click on it.

Alternatives considered

I can get around these issues with pinning the space Foo in my sidebar, but it's not the real-life solution for this issue.

Additional context

No response