Add Qdrant vector database support

[minh89hywithhlovee]

Summary

• add a Qdrant vector database client that uses the REST API directly via axios
• support collection creation, point upsert, vector query, point retrieval, and deletion
• export Qdrant from the vector-db package

Tests

• npx.cmd tsc -b
• npx.cmd jest src/vector-db/src/tests/qdrant/qdrant.test.ts --runInBand

Closes #273

[minh89hywithhlovee]

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