Doc: Updated sharing behavior in the open-source editions. (#7293)

### What problem does this PR solve?


### Type of change


- [x] Documentation Update

docs/guides/team/share_knowledge_bases.md

@@ -0,0 +1,22 @@
+---
+sidebar_position: 3
+slug: /share_datasets
+---
+
+# Share knowledge base
+
+Share a knowledge base with team members.
+
+---
+
+When ready, you may share your knowledge bases with your team members so that they can upload and parse files in them. Please note that your knowledge bases are not shared automatically; you must manually enable sharing by selecting the appropriate **Permissions** radio button:
+
+1. Navigate to the knowledge base's **Configuration** page.
+2. Change **Permissions** from **Only me** to **Team**.
+3. Click **Save** to apply your changes.
+
+![share_knowledge_base](https://raw.githubusercontent.com/infiniflow/ragflow-docs/main/images/share_knowledge_base.jpg)
+
+*Once completed, your team members will see your shared knowledge bases like this:*
+
+![shared_knowledge_base](https://raw.githubusercontent.com/infiniflow/ragflow-docs/main/images/shared_knowledge_base.jpg)