✨ Add Zulip node docs

docs/nodes/credentials/Zulip/README.md

@@ -11,7 +11,7 @@ Create a [Zulip](https://zulip.com/) account.
 1. Access your Zulip dashboard.
 2. Click on the gear icon on the top right.
 3. Click on Settings.
-4. Click on "Show/Change API Key".
+4. Click on the *Show/change your API key* button under the API Key section.
 5. Use your Zulip email, URL and the API token in your Zulip credentials.
 
 ![Getting Zulip credentials](./using-access-token.gif)

docs/nodes/nodes-library/nodes/Zulip/README.md

@@ -0,0 +1,54 @@
+---
+permalink: /nodes/n8n-nodes-base.zulip
+---
+
+# Zulip
+
+[Zulip](https://zulipchat.com/) is an open source chat and collaborative software. In Zulip, communication occurs in streams (which are like channels in IRC).
+
+::: tip 🔑 Credentials
+You can find authentication information for this node [here](../../../credentials/Zulip/README.md).
+:::
+
+## Basic Operations
+
+- Message
+    - Delete a message
+    - Get a message
+    - Send a private message
+    - Send a message to stream
+    - Update a message
+    - Upload a file
+- Stream
+	- Create a stream
+	- Delete a stream
+    - Get all streams
+    - Get subscribed streams
+    - Update a stream
+- User
+	- Create a user
+	- Deactivate a user
+	- Get a user
+	- Get all users
+    - Update a user
+
+## Example Usage
+
+This workflow allows you to send a private message on Zulip. You can also find the [workflow](https://n8n.io/workflows/498) on the website. This example usage workflow would use the following two nodes.
+- [Start](../../core-nodes/Start/README.md)
+- [Zulip]()
+
+The final workflow should look like the following image.
+
+![A workflow with the Zulip node](./workflow.png)
+
+### 1. Start node
+
+The start node exists by default when you create a new workflow.
+
+### 2. Zulip node
+
+1. First of all, you'll have to enter credentials for the Zulip node. You can find out how to do that [here](../../../credentials/Zulip/README.md).
+2. Select the user you want to send a private message to from the *To* dropdown list.
+3. Type the message you want to post in the *Content* field.
+4. Click on *Execute Node* to run the workflow.