Clan showcase changes

[-BoG-07734Willey]

When you view a clan, the first thing you see is their showcase. However, in its current state, clans have no control over what/who gets displayed there, and for larger clans (mountain, moon), it doesn't do much for representing the clan. I had the idea that maybe instead of the current showcase, we could use captura scenes, and the tenno of the clan could position themselves within it. Clan members with the ruler role would be able to set the captura, and then clanmates can just go end edit themselves into it anytime later on. There might have to be other restrictions, such as preventing tenno from placing themselves directly within another warframe (or within 2 meters of), and maybe cap how many be in scene (or require some role like architect, so rulers can control who can choose to be in the showcase). It could even make use of the recent upgrade to the dojo vault donations-  players could donate captures for the clan to potentially use. I just figure customizing the front page for the clan could be neat.