added sui topic

topics/sui/index.md

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+---
+created_by: Mysten Labs
+display_name: Sui
+logo: sui.png
+released: May 3, 2023
+short_description: Sui is a high-performance, object-centric blockchain for smart contracts and digital assets.
+topic: sui
+related: blockchain, cryptocurrency, move-language
+url: https://sui.io/
+github_url: https://github.com/MystenLabs/sui
+wikipedia_url: https://en.wikipedia.org/wiki/Sui_(blockchain)
+---
+Sui is a decentralized, permissionless blockchain designed for instant finality, low latency, and high throughput. It uses the Move programming language to enable scalable and secure smart contract development, and introduces a novel object-centric model that allows parallel transaction execution.