Add a middle layer of agents to enhance standalone IoTDB with full-fledged scalable distributed system properties

**Is your feature request related to a problem? Please describe.**

This is an enhancement feature that shall extend standalone IoTDB with scalability.
The goal of this feature is to **add a middle layer of agents to enhance standalone IoTDB with full-fledged scalable distributed system properties. **

**Describe the solution you'd like**

Would like to add a middle of stateless agents that can orchestrate a set of standalone IoTDB instances to form a full-fledged scalable distributed system.

Each of such stateless agents should at least function like [IKR](https://github.com/thulab/iotdb-kairosdb), except for 1) not supporting JSON interface at the moment; 2) support the native IoTDB session interfaces; 3) support data partitioning and sharding for the initial implementation.

**Describe alternatives you've considered**

Believe no alternatives should exist.

**Additional context**

IginX is a possible name for the agent.

Comience revisando la arquitectura independiente de IoTDB y el proyecto IKR enlazado para comprender la capa de agentes propuesta. A continuación, examine cómo tendrían que funcionar las interfaces de sesión nativas de IoTDB, la partición de datos y el sharding entre instancias independientes. La tarea se considerará completada cuando exista un diseño acordado y una implementación de los agentes sin estado con esas capacidades iniciales.

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