Add user presence and client reset project cards & update kotlin logo

source/sdk/kotlin.txt

@@ -186,3 +186,42 @@ Recommended Reading
       :icon-alt: Migrate Icon
 
       Learn why and how to switch from the Java SDK to the Kotlin SDK.
+
+Example Projects
+----------------
+
+Explore engineering and community-provided example projects to learn best 
+practices and common development patterns for Realm and Atlas App Services
+using the Kotlin SDK.
+
+.. card-group::
+   :columns: 3
+   :style: extra-compact
+
+   .. card::
+      :headline: Property-Level Encryption
+      :cta: Example project
+      :url: https://github.com/realm/realm-kotlin-samples/blob/main/AppServicesUsageSamples/apps/property-encryption/README.md
+      :icon: /images/icons/branding_2023/General_SECURITY_Encryption10x.png
+      :icon-alt: Encryption Icon
+
+      Enhance user data security with property-level encryption.
+
+   .. card::
+      :headline: User's Online State
+      :cta: Example project
+      :url: https://github.com/realm/realm-kotlin-samples/blob/main/AppServicesUsageSamples/apps/presence-detection/README.md
+      :icon: /images/icons/branding_2023/Technical_REALM_Offline10x.png
+      :icon-alt: Realm Offline Icon
+
+      Detect connectivity and activity of users and devices. 
+
+   .. card::
+      :headline: Connection State Change & Error Handling
+      :cta: Example project
+      :url: https://github.com/realm/realm-kotlin-samples/blob/main/AppServicesUsageSamples/apps/error-handling/README.md
+      :icon: /images/icons/branding_2023/General_CLOUD_Mobility10x.png
+      :icon-alt: Cloud Mobile Transfer Icon
+
+      Learn best practices around handling Sync errors and client reset 
+      strategies.