Add Actual Schema Gradle Plugin to Database

* Add Actual Schema Gradle Plugin to Database

Adds Actual Schema Gradle Plugin to the Database section.

The plugin generates a final PostgreSQL schema.sql/DDL from Liquibase migrations by applying them to a temporary PostgreSQL database via Testcontainers. This helps teams keep the actual resulting database schema in Git and review schema changes in pull requests or CI.

* Fix Actual Schema Gradle Plugin entry

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Co-authored-by: Andreas Kull <akullpp@gmail.com>

Author: YRashid

README.md

@@ -342,6 +342,7 @@ _Efficient and specific data structures._
 
 _Everything that simplifies interactions with the database._
 
+- [Actual Schema Gradle Plugin](https://github.com/YRashid/actual-schema-gradle-plugin) - Generates PostgreSQL schema DDL from Liquibase migrations using Testcontainers.
 - [Apache Calcite](https://calcite.apache.org) - Dynamic data management framework. It contains many of the pieces that comprise a typical database management system.
 - [Apache Drill](https://drill.apache.org) - Distributed, schema on-the-fly, ANSI SQL query engine for Big Data exploration.
 - [Apache Phoenix](https://phoenix.apache.org) - High-performance relational database layer over HBase for low-latency applications.