* Add empty state view for `HomeSpacesView`
This links to the create space flow, and has an 'explore public spaces', hidden for now.
* Make sure we display the empty view if the 'create spaces' FF is enabled
Also, remove the tab and navigate to the chats tab if the FF is disabled and the last space is left
* Update screenshots
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Co-authored-by: ElementBot <android@element.io>
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