docs: update homepage links and minor documentation updates

docs/another-page.mdx

@@ -1 +0,0 @@
-# Another Page

docs/examples.mdx

@@ -1,8 +1,16 @@
-# Examples
-Thermion is a package for creating 3D applications with Dart and/or Flutter.
+## Showcase
+
+## DartPad Playground
+
+A custom DartPad that lets you experiment with Thermion from your browser (currently, only Chrome is supported).
+
+[![Screenshot of Thermion Dartpad](images/dartpad.thermion.dev_.png)](https://thermion.dev)
+
+## Nick Fisher 
+
+My personal website, where I create an interactive clone of myself with Avaturn & Cartesia (no Flutter, made with Thermion and the [Jaspr Dart UI framework](https://github.com/schultek/jaspr).
+
+[![Screenshot of Nick Fisher's personal website](images/nick-fisher.com.png)](https://nick-fisher.com)
 
-## Polyvox 
 
-iOS app
 
-## Nick Fisher (Personal Website)

docs/quickstart.mdx

@@ -13,7 +13,7 @@ $ flutter pub add thermion_flutter
 
 2. If running on iOS or MacOS, change the minimum deployment target to OSX 13
 
-<Accordion title="Click to iOS/MacOS instructions">
+<Accordion title="Click to open iOS/MacOS instructions">
 
 Make sure the `platform` entry refers to `13.0` in your Podfile.
 
@@ -38,6 +38,11 @@ and change the minimum deployment target to 13.0:
 
 </Accordion>
 
+<Accordion title="Click to open Windows instructions">
+See the [/windows](Windows) page for steps needed to build on Windows.
+</Accordion>
+
+
 2. Add a folder containing your assets (glTF model + skybox ktx) to your `pubspec.yaml` asset list
 
 ```yaml