[FR] Showing all the spaces in the sidebar

### Description

Instead of currently hiding spaces / only showing one space, I would love to have all the spaces that I am in showing in the sidebar. I believe this is what currently Notion is on. I understand there will be a chances that the sidebar will be so long, but having multiple spaces showing on the sidebar is a lot easier in navigation. Plus if there are more and more spaces in the future, it might be hard to recall where exactly are the particular pages in which particular spaces, having everything in the sidebar will be a lot easier to find, I understand there is favorite, but sometimes some of the pages might not be something we always need, but just need that from time to time

### Impact

Instead of creating multiple pages inside one space so to have better organization, if I can have multiple spaces shown, I can use spaces as a way to organize all the things instead

### Additional Context

_No response_