Mv vearch provider doc (#10466)

docs/extras/integrations/providers/vearch.md

@@ -0,0 +1,15 @@
+# Vearch
+
+Vearch is a scalable distributed system for efficient similarity search of deep learning vectors.
+
+# Installation and Setup
+
+Vearch Python SDK enables vearch to use locally. Vearch python sdk can be installed easily by pip install vearch.
+
+# Vectorstore
+
+Vearch also can used as vectorstore. Most detalis in [this notebook](docs/modules/indexes/vectorstores/examples/vearch.ipynb)
+
+```python
+from langchain.vectorstores import Vearch
+```