feat: qdrant generic client (#3377)

### Qdrant Client

* Add core client with collection, search, and document APIs (sync + async)
* Refactor utilities, types, and vector params (default 384-dim)
* Improve error handling with `ClientMethodMismatchError`
* Add score normalization, async embeddings, and optional `qdrant-client` dep
* Expand tests and type safety throughout

pyproject.toml

@@ -68,6 +68,9 @@ docling = [
 aisuite = [
     "aisuite>=0.1.10",
 ]
+qdrant = [
+    "qdrant-client[fastembed]>=1.14.3",
+]
 
 [tool.uv]
 dev-dependencies = [