Update READMEs and screenshots

Author: Rick Butterfield

.github/README.md

@@ -6,7 +6,16 @@
 
 A package from the [Umbraco Community Sustainability Team](https://umbraco.com/blog/meet-the-new-community-sustainability-team/) which helps developers and editors see and improve the carbon impact of their websites.
 
-In the Backoffice, there is a Content App to see page weight and carbon emissions, which is then converted to a carbon rating for individual pages.
+## Features
+Once installed, two new features are enabled:
+
+### Sustainability section
+A section is enabled automatically for admin users that allows tracking of average stats based on recent tests, plus a breakdown of all scores per page.
+
+<img src="https://raw.githubusercontent.com/rickbutterfield/Umbraco.Community.Sustainability/main/.github/assets/sustainability-dashboard-1.png" alt="Umbraco.Community.Sustainability dashboard" />
+
+### Sustainability content app
+On each content page, a Content App is added which allows users to see and benchmark page weight and carbon emissions, which is then converted to a carbon rating for individual pages.
 
 <img src="https://raw.githubusercontent.com/rickbutterfield/Umbraco.Community.Sustainability/main/.github/assets/sustainability-contentapp-2.jpeg" alt="Umbraco.Community.Sustainability content app" />
 

.github/assets/sustainability-dashboard-1.png

@@ -6,7 +6,16 @@
 
 A package from the [Umbraco Community Sustainability Team](https://umbraco.com/blog/meet-the-new-community-sustainability-team/) which helps developers and editors see and improve the carbon impact of their websites.
 
-In the Backoffice, there is a Content App to see page weight and carbon emissions, which is then converted to a carbon rating for individual pages.
+## Features
+Once installed, two new features are enabled:
+
+### Sustainability section
+A section is enabled automatically for admin users that allows tracking of average stats based on recent tests, plus a breakdown of all scores per page.
+
+<img src="https://raw.githubusercontent.com/rickbutterfield/Umbraco.Community.Sustainability/main/.github/assets/sustainability-dashboard-1.png" alt="Umbraco.Community.Sustainability dashboard" />
+
+### Sustainability content app
+On each content page, a Content App is added which allows users to see and benchmark page weight and carbon emissions, which is then converted to a carbon rating for individual pages.
 
 <img src="https://raw.githubusercontent.com/rickbutterfield/Umbraco.Community.Sustainability/main/.github/assets/sustainability-contentapp-2.jpeg" alt="Umbraco.Community.Sustainability content app" />
 

.github/assets/sustainability-dashboard-2.png

@@ -27,6 +27,14 @@
     {
       "ImageUrl": "https://raw.githubusercontent.com/rickbutterfield/Umbraco.Community.Sustainability/main/.github/assets/sustainability-contentapp-2.jpeg",
       "Caption": "Content app for Sustainability - view detailed report"
+    },
+    {
+      "ImageUrl": "https://raw.githubusercontent.com/rickbutterfield/Umbraco.Community.Sustainability/main/.github/assets/sustainability-dashboard-1.png",
+      "Caption": "Sustainability section - overview and average scores"
+    },
+    {
+      "ImageUrl": "https://raw.githubusercontent.com/rickbutterfield/Umbraco.Community.Sustainability/main/.github/assets/sustainability-dashboard-2.png",
+      "Caption": "Sustainability section - breakdown of all recent reports"
     }
   ],
   "Tags": [