WIP: Microsoft.Extensions.VectorData Implementation

[rafsanulhasan]

Closes #513

This is an initial initial implementation of Microsoft.Extensions.VectorData abstranctions to Support Vector Data.

This implementation allows users to use Microsoft provided abstractions to access (read/insert/update/upsert/delete records) ArangoDB.

This implementation also supports accessing/manipulating vector embeddings and search embeddings.

As a result, this implementation can be used to:

• Integrate ArangoDB as a DocumentDB
• Work with Vector Embeddings
  • Access Vector Embeddings
  • Perform semantic search using Vector Embeddings
  • Integrate as Agent Memory with Semantic Kernel Plugins or Microsoft Gent Framework Functions
  • Uses on IEmbeddingGenerator abstractions from Microsocft.Extensions.AI

It supports LINQ for filtering and sorting.
A number of Unit tests and Integrations Tests are written for testing the functionalities. Used ArangoDB TestContainers to spin up containers for integration testing with real database.

[Copilot]

Pull Request Overview

This PR introduces a Microsoft.Extensions.VectorData implementation for ArangoDB, enabling vector search capabilities and document operations. The implementation provides abstractions for working with ArangoDB as both a document database and vector store, supporting semantic search, LINQ filtering, and integration with AI embedding generators.

Key Changes

• Implementation of vector store and collection abstractions (ArangoVectorStore, ArangoCollection, ArangoDynamicCollection)
• Vector and hybrid search capabilities (ArangoVectorSearchable, ArangoHybridSearchable)
• LINQ expression to AQL query translation for filtering and sorting
• Comprehensive unit and integration test coverage using TestContainers

Reviewed Changes

Copilot reviewed 56 out of 56 changed files in this pull request and generated 10 comments.

Show a summary per file

File	Description
arangodb-net-standard.sln	Updated Visual Studio version and added new projects to solution
ArongoDB.KernelMemory/*	Placeholder implementation for Kernel Memory integration with stub methods
ArongoDB.Extensions.VectorData/*	Core implementation of vector data abstractions, collections, and search functionality
ArongoDB.Extensions.VectorData/Helpers/*	Helper classes for LINQ expression parsing, AQL generation, and query building
ArongoDB.Extensions.VectorData.Tests/*	Comprehensive unit and integration tests for all components

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