[Feature]: Add simple vector search and AI query API endpoints

[kinza7124]

What feature do you want?

Currently, InsForge supports vector embeddings via PostgreSQL + pgvector and AI Model Gateway integrations, but querying them requires manual work.

This feature will create easy-to-use API endpoints so that users can:

Perform semantic vector searches via a simple REST endpoint.

Query AI models through a standardized API endpoint.

Optionally, use SDK helper functions for JavaScript/TypeScript clients.

Why do you need this?

This will help:

Reduce manual work when querying vector databases or AI models.

Make InsForge more user-friendly for semantic search and RAG workflows.

Insforge.dev PR.docx

[kinza7124]

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