Update README for Neo4j NestJS Module

[dosine-staging]

This pull request updates the README.md file for the Neo4j module used with NestJS. The changes include:

• Enhanced the description to clarify that this is a NestJS module for Neo4j using the Neo4j JavaScript driver.
• Added support details including connection pooling, encryption, transaction support, CRUD helpers, JSON and streaming protocol options, and reactive driver API.
• Updated installation instructions to include manual installation of @nestjs/core, reflect-metadata, and neo4j-driver.
• Provided examples for both static and async module definitions, including necessary imports.
• Improved the section on Neo4jService with a link to the source code.

These updates aim to provide clearer guidance and better usability for developers integrating Neo4j with NestJS.

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This pull request was co-created with Cosine Genie

Original Task: nestjs-neo4j/knqf7008wyua
Author: Pandelis Zembashis