feat(doc): add ksqldb connecting document

Author: andreashimin

packages/doc/docs/connect/ksqldb.mdx

@@ -0,0 +1,40 @@
+# KsqlDB
+
+## Installation
+
+1. Install the package:
+
+   **If you are developing with binary, the package is already bundled in the binary. You can skip this step.**
+
+   ```bash
+   npm i @vulcan-sql/extension-driver-ksqldb
+   ```
+
+2. Update your `vulcan.yaml` file to enable the extension:
+
+   ```yaml
+   extensions:
+     ...
+     // highlight-next-line
+     ksqldb: '@vulcan-sql/extension-driver-ksqldb' # Add this line
+   ```
+
+3. Create a new profile in your `profiles.yaml` file or in the designated profile paths. For example:
+
+   ```yaml
+   - name: ksql # profile name
+     type: ksqldb
+     connection:
+       host: www.example.com:8088
+       username: <username>
+       password: <password>
+     allow: '*'
+   ```
+
+## Configuration
+
+| Name    | Required | Default   | Description |
+| ------- | -------- | --------- | ----------- |
+| host     | N        |  http://localhost:8088  | ksqlDB instance.  |
+| username | N        |                         | The name of the user on whose behalf requests are made.  |
+| password | N        |                         | The user's password.  |

packages/doc/sidebars.js

@@ -76,6 +76,10 @@ const sidebars = {
           type: 'doc',
           id: 'connect/clickhouse',
         },
+        {
+          type: 'doc',
+          id: 'connect/ksqldb',
+        },
       ],
     },
     {