Feature: Leaderboard logic

[tinypell3ts]

Description

This PR introduces a basic leaderboard component. It retrieves data from the subgraph, sorts it, and transforms it into a suitable array of users and their xp_rewarded, which is then displayed as a list in a table.

Added

• Add @openformat/react, dayjs, ethers and graphql-request packages
• add .env.example and types file
• wrap app with OpenFormatProvider
• Add Leaderboard logic and markup

Updated

• Update vite config and tsconfig
• update backend server port to 8080