Initial documentation addition

Signed-off-by: Matt Farina <matt.farina@suse.com>

docs/README.md

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+# Rancher Desktop Documentation
+
+The documentation provides documentation to introduce you to using Rancher
+Desktop. Current documentation covers:
+
+- [Installing Rancher Desktop](installing.md)
+- [Working with images](images.md)

docs/images.md

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+# Images
+
+Rancher Desktop provides the ability to build, push, and pull images via the
+[KIM](https://github.com/rancher/kim) project.
+
+Note, on Mac `kim` is put into the path. This feature is not yet working on
+Windows and you will need to either manually add the binary to your path or
+install KIM directly. Adding KIM to your path is coming soon.
+
+## Using KIM
+
+You can learn about all of the command options by running `kim -h`. This will
+display the help documentation.
+
+KIM has a client side and server side component. The server side part is a
+container running in Kubernetes while the client side application runs on
+Mac or Windows. Images are stored in the same containerd that Kubernetes uses.
+
+## Building Images
+
+Building images has a similar feel to existing tools. For example, consider
+running `kim` from a directory with a `Dockerfile` where the `Dockerfile` is
+using a scratch image.
+
+```console
+❯ kim build .
+[+] Building 0.1s (4/4) FINISHED
+ => [internal] load build definition from Dockerfile
+ => => transferring dockerfile: 31B
+ => [internal] load .dockerignore
+ => => transferring context: 2B
+ => [internal] load build context
+ => => transferring context: 33B
+ => CACHED [1/1] ADD anvil-app /
+ ```
+
+`kim` has tags for tagging at the same time as building and other options you've
+come to expect.
+
+If you want to tag an existing image you've built you can use the `kim tag`
+command.

docs/installing.md

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+# Installing Rancher Desktop
+
+Rancher Desktop is delivered as a desktop application. You can download it from
+the [releases page on GitHub](https://github.com/rancher-sandbox/rd/releases).
+
+When run for the first time or when changing versions, Kubernetes container
+images are downloaded. It may take a little time to load on first run for a new
+Kubernetes version.
+
+Note, the Windows installer is not yet signed. This will happen soon. In the
+meantime, when presented with a dialog box like the following, click on "More
+info".
+
+![](images/windows-notice-1.png)
+
+The following dialog will then give you the option to run the application:
+
+![](images/windows-notice-2.png)