This child bounty is for OpenSquare's retroactive work to migrate [statescan v1](https://github.com/opensquare-network/statescan) to [v2](https://github.com/opensquare-network/statescan-v2). The work includes:

1. Abandon next.js and SSO, and rewrite the fronted code with react. We redesigned most UI components and implemented dark mode. The new code is also more friendly and modularized to support common substrate chains.
2. We rewrite most scan scripts for uniques/assets pallet, and improve the logic toe scan on-chain accounts.
3. NFT parsing scripts are refactored into [several modules](https://github.com/opensquare-network/statescan-v2/tree/main/backend/packages/uniques-scan/src/scripts), so it will become easier to fetch and parse thousands of NFT resources including images and videos.
4. Create a common package to extract code handling with mongodb.
5. Extract calls from extrinsics and show them in separated list and detail pages.

0x526574726f61637469766520776f726b20666f722073746174657363616e207632

- **Problem Statement:** OpenSquare needs to migrate statescan v1 to v2, abandoning next.js and SSO, rewriting frontend code with react, improving scan scripts, and refactoring NFT parsing scripts.
- **Significance:** Enhancing UI components, scan scripts, and NFT parsing will improve user experience and efficiency in handling NFT resources.
- **Proposed Solution:** Rewrite frontend code with react, improve scan scripts, refactor NFT parsing scripts, and create a common package for mongodb handling.
- **Expected Outcomes:** Enhanced UI, improved scan logic, easier NFT resource fetching, and streamlined code handling with mongodb.

#520 Retroactive work for statescan v2