add a database project "DB3 Network“

README.md

@@ -199,6 +199,7 @@ See also [Rust — Production](https://www.rust-lang.org/production) organizatio
 ### Database
 
 * [Databend](https://github.com/datafuselabs/databend) - A Modern Real-Time Data Processing & Analytics DBMS with Cloud-Native Architecture [![Release](https://github.com/datafuselabs/databend/actions/workflows/databend-release.yml/badge.svg)](https://github.com/datafuselabs/databend/actions/workflows/databend-release.yml)
+* [DB3 Network](https://github.com/dbpunk-labs/db3) — DB3 is a community-driven blockchain layer2 decentralized database network ![GitHub Workflow Status (with event)](https://img.shields.io/github/actions/workflow/status/dbpunk-labs/db3/ci.yml?branch=main&style=flat-square)
 * [indradb](https://crates.io/crates/indradb) — Rust based graph database [![build badge](https://api.travis-ci.org/indradb/indradb.svg?branch=master)](https://travis-ci.org/indradb/indradb)
 * [Lucid](https://github.com/lucid-kv/lucid) — High performance and distributed KV store accessible through a HTTP API. [![Build Status](https://github.com/lucid-kv/lucid/workflows/Lucid/badge.svg?branch=master)](https://github.com/lucid-kv/lucid/actions?workflow=Lucid)
 * [Materialize](https://github.com/MaterializeInc/materialize) - Streaming SQL database powered by Timely Dataflow :heavy_dollar_sign: [![Build status](https://badge.buildkite.com/97d6604e015bf633d1c2a12d166bb46f3b43a927d3952c999a.svg?branch=main)](https://buildkite.com/materialize/tests)