Add Qdrant support to vector-db package

[frankyueng12]

/claim #273

PR: Add Qdrant support to vector-db package

Summary

Adds a Qdrant vector database provider to the JS SDK vector-db package.

Closes / addresses: #273

Changes

• Add Qdrant provider under src/vector-db/src/lib/qdrant/qdrant.ts.
• Export Qdrant from src/vector-db/src/index.ts.
• Support creating a client from explicit values or QDRANT_URL / QDRANT_API_KEY.
• Support common Qdrant REST operations:
  • create collection
  • upsert vector points
  • search vector points
  • scroll points
  • retrieve by id
  • update payload by id
  • delete by id
• Add Jest tests for client creation, collection creation, upsert, search, and delete request construction.

Validation

• git diff --check passes.
• npm run build passes.
• npx jest src/vector-db/src/tests/qdrant/qdrant.test.ts --runInBand passes.

Notes

The implementation uses Qdrant's REST API directly instead of adding a new package dependency.

[github-actions]

CLA Assistant Lite bot All contributors have signed the CLA ✍️ ✅

[frankyueng12]

I have read the Arakoo CLA Document and I hereby sign the CLA

[frankyueng12]

recheck