Updating Link documentation with admin guides from Notion (#3)

Add the rest of the Admin guides from our Notion site. Closes #1, #2.

Reviewed-on: #3
Reviewed-by: Iain Learmonth <irl@sr2.uk>
Co-authored-by: Ana Custura <ana@sr2.uk>
Co-committed-by: Ana Custura <ana@sr2.uk>

docs/link/autoresponders.md

@@ -0,0 +1,54 @@
+---
+title: Autoresponders
+sidebar_position: 103
+---
+# Setting up an autoresponder (WhatsApp/Signal auto reply)
+
+In order to setup automatic replies for WhatsApp or Signal you need to:
+
+1. use Zammad in version 6.1.0 or newer
+2. have previously created WhatsApp/Signal bot
+3. create a webhook:
+    - go to Settings → Webhook → New Webhook
+    - give it any name
+    - the endpoint is (for link based instances):
+        
+        ```
+        http://link:3000/link/api/whatsapp/bots/<bot-token>/send
+        http://link:3000/link/api/signal/bots/<bot-token>/send
+        ```
+        
+        where the \<bot-token\> can be found in admin panel of your helpdesk (helpdesk-name-admin.cdr.link) - go to WhatsApp/Signal, click on the bot, copy the token
+        
+    - HMAC SHA1 SIGNATURE TOKEN - leave empty
+    - SSL VERIFY - no
+    - HTTP BASIC AUTHENTICATION USERNAME - empty
+    - HTTP BASIC AUTHENTICATION PASSWORD - empty
+    - CUSTOM PAYLOAD - use json below, you can modify it in order to create more customised message body:
+    
+    ```json
+    {
+    "to": "#{ticket.customer.phone}",
+    "message": "Your ticket has been received."
+    }
+    ```
+    
+    - set the Webhook to active and press ‘Submit’
+4. now you need to create a Trigger:
+    - go to Settings → Trigger → New Trigger
+    - set the name
+    - ACTIVATED BY - Action
+    - ACTION EXECUTION - Selective (default)
+    - CONDITIONS FOR AFFECTED OBJECTS*:
+        - Action is Created
+        - State is not closed
+        - (Article) Type is cdr_signal/cdr_whatsapp
+    - EXPERT MODE - off
+    - EXECUTE CHANGES ON OBJECTS: Webhook: webhook created in point 3
+    - optional note
+    - set to active and Submit
+
+<aside>
+🤩 Thats it!
+
+</aside>