feat: Add Ember Polaris examples and rename previous Ember examples to Ember Octane (#221)

* feat: Add 'Ember Polaris' examples and rename previous Ember examples to 'Ember Octane'

* chore: Update playground URL for Ember Polaris

* Merge branch 'main' into feat/ember-polaris

* chore: Adressed suggestions on Ember Polaris preview

* chore: Moved `favoriteColors` array to JavaScript

* chore: Improved component properties showcase on Ember Polaris preview

---------

Co-authored-by: spuxx1701 <hi@spuxx.dev>

README.md

@@ -237,7 +237,44 @@ How do we solve this ? Developers love having framework overview by examples. It
 </details><details>
         <summary>
             <img width="18" height="18" src="public/framework/ember.svg" />
-            <b>Ember</b>
+            <b>Ember (Polaris - preview)</b>
+            <img src="https://us-central1-progress-markdown.cloudfunctions.net/progress/84" /></summary>
+
+- [x] Reactivity
+  - [x] Declare state
+  - [x] Update state
+  - [x] Computed state
+- [x] Templating
+  - [x] Minimal template
+  - [x] Styling
+  - [x] Loop
+  - [x] Event click
+  - [x] Dom ref
+  - [x] Conditional
+- [x] Lifecycle
+  - [x] On mount
+  - [x] On unmount
+- [x] Component composition
+  - [x] Props
+  - [x] Emit to parent
+  - [x] Slot
+  - [x] Slot fallback
+  - [x] Context
+- [x] Form input
+  - [x] Input text
+  - [x] Checkbox
+  - [x] Radio
+  - [x] Select
+- [ ] Webapp features
+  - [ ] Render app
+  - [ ] Fetch data
+  - [ ] Router link
+  - [ ] Routing
+
+</details><details>
+        <summary>
+            <img width="18" height="18" src="public/framework/ember.svg" />
+            <b>Ember (Octane)</b>
             <img src="https://us-central1-progress-markdown.cloudfunctions.net/progress/96" /></summary>
 
 - [x] Reactivity