Update Atrium info & new category request

[whankinsiv]

Audit: https://drive.google.com/file/d/1C2-pMSKDE6ZsJuHIeqMcPsnWzW68UE4m/view

project name: ATMA

logo: https://uc0a648c956b8a4b8eda5ba89f07.previews.dropboxusercontent.com/p/thumb/ACt5AkZjdX3eyI-ARcPZS_FjpcQJ49IO9VM5ZbBCFuQZJV8wBcSX1xXFvxoS7Mw7Vvp8VnioE3HcAPXexvmSdBgSsteT7rcf1o-Ovvh-k14BUjP8RGoJYwPSgn8aR9FvtYjtD1aFD5DiRr6CRo1v9kSd6624PQxcL0uxK6TkNAKfPxPU2i-c7CYWTkkJR8jB02mmSlD1VZyWRYFjkKuAhxedRWrtK5z4RZp3MCz2bdTirFiQ-4o1zgbnyE-N9zXtInOuiAkPggLOCisKuxpAAwgDAHZs-6XfDgI5r6gvdnN1P68v0BjNeishgc5jMPOI1lgjuXeAWMtrkTO3K33LM0ILes4RX8G-MUDvJbMpLtAN2-WchDaS3FWcGzJj1Ryoufg/p.png?is_prewarmed=true

Atrium is a distributed staking protocol and its architecture does not properly fit into any of the existing categories. Please consider creating a new category for these types of protocols.

Category name: Distributed Staking
Category description: Protocols that allow users to distribute their stake delegation across multiple stake pools.