DOCSP-31331: Add card for Offline Login project to Kotlin landing page (#3055)

Adds card for Offline Login project to the Kotlin landing page's Example
Projects section

> NOTE: realm/realm-kotlin-samples#44 updates
the project README to make it clear that the offline login sample is
contained within the prop-lvl encryption sample project and so uses the
same link

## Pull Request Info

### Jira

- https://jira.mongodb.org/browse/DOCSP-31331

### Staged Changes

- [Kotlin landing
page](https://preview-mongodbcbullinger.gatsbyjs.io/realm/docsp-31331-offline-login-project/sdk/kotlin/#example-projects)

### Reminder Checklist

If your PR modifies the docs, you might need to also update some
corresponding
pages. Check if completed or N/A.

- [x] Create Jira ticket for corresponding docs-app-services update(s),
if any
- [x] Checked/updated Admin API
- [x] Checked/updated CLI reference

### Review Guidelines


[REVIEWING.md](https://github.com/mongodb/docs-realm/blob/master/REVIEWING.md)

Author: cbullinger

source/example-projects.txt

@@ -62,6 +62,8 @@ Learn about the core features of Realm with Atlas Device Sync.
       Use multiple realms to allow registered users to sync and manage movies in their own private list.
     - - `React Native <https://github.com/realm/realm-js/tree/main/examples/rn-multiple-realms>`__
 
+.. _realm-example-projects-table:
+
 Example Projects
 ----------------
 
@@ -120,7 +122,7 @@ Check out these supplementary projects to build on the power of Realm with Atlas
     - - `Kotlin <https://github.com/realm/realm-kotlin-samples/tree/main/MultiplatformDemo>`__
 
   * - JVM Console Application
-    - Build a simple Jave Console Application using Realm Kotlin. 
+    - Build a simple Java Console Application using Realm Kotlin. 
     - - `Kotlin <https://github.com/realm/realm-kotlin-samples/tree/main/JVMConsole>`__
 
   * - Property-level Encryption

source/images/icons/branding_2023/General_CONTENT_Users10x.png

@@ -193,7 +193,8 @@ Example Projects
 
 Explore engineering and expert-provided example projects to learn best 
 practices and common development patterns for Realm and Atlas App Services
-using the Kotlin SDK.
+using the Kotlin SDK. Check out the :ref:`<realm-example-projects-table>` page
+for more Kotlin sample apps.
 
 .. card-group::
    :columns: 3
@@ -207,13 +208,22 @@ using the Kotlin SDK.
       :icon-alt: Encryption Icon
 
       Enhance user data security with property-level encryption.
+   
+   .. card::
+      :headline: Offline Login and Realm Access
+      :cta: Example project
+      :url: https://github.com/realm/realm-kotlin-samples/blob/main/AppServicesUsageSamples/apps/property-encryption/README.md
+      :icon: /images/icons/branding_2023/Technical_REALM_Offline10x.png
+      :icon-alt: Realm Offline Icon
+
+      Log in a Device Sync user and open a synced realm offline.
 
    .. 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
+      :icon: /images/icons/branding_2023/General_CONTENT_Users10x.png
+      :icon-alt: Users Icon
 
       Detect connectivity and activity of users and devices.