Proto Query Interface

[TobiasHafner]

This pull request introduces a new query interface plugin called the Proto Interface, designed to enhance Polypheny's capability by enabling multimodel querying through a protobuf and gRPC-based protocol.

Changes

• Architecture Expansion: A new interface plugin was added, and a new protobuf and gRPC-based protocol implemented.

Features

• Proto Interface Plugin: A new plugin facilitating multimodel querying capabilities across different data models using protobuf and gRPC.

Tests

• Integration Tests: Implemented to ensure the Proto Interface correctly interacts with existing Polypheny components.
• Performance Tests: Conducted to verify that the introduction of the new interface does not adversely affect the system's performance.

Notice

The plugin is not enabled, and the interface is not deployed by default. This will happen as part of a second pull request that introduces additional improvements. Further, this new interface will, as part of this next PR, also be renamed to Prism-Interface.

[datomo]

Thank you @TobiasHafner, this looks good.

[vogti]

Thx, @TobiasHafner, for this PR!