Add links to service status page on header and footer (#658)

## 📝 Description
Add links to the Semaphore Status page on header and footer

See #657

## ✅ Checklist
- [X] I have tested this change
- [ ] This change requires documentation update

Author: TomFern

docs/docusaurus.config.js

@@ -198,6 +198,11 @@ const config = {
             position: 'right',
 
           },
+          {
+            href: 'https://status.semaphore.io/',
+            position: 'right',
+            label: 'Service Status'
+          },
           {
             type: 'search',
             position: 'right',
@@ -243,6 +248,10 @@ const config = {
           {
             title: 'More',
             items: [
+              {
+                label: 'Cloud Service Status',
+                href: 'https://status.semaphore.io/',
+              },
               {
                 label: 'Semaphore Blog',
                 href: 'https://semaphore.io/blog',