Add blog post for custom tile features (#1697)

Author: piitaya

blog/2023-02-28-custom-tile-features.md

@@ -0,0 +1,29 @@
+---
+author: Paul Bottein
+authorURL: https://github.com/piitaya
+authorTwitter: piitaya
+title: Custom tile features
+---
+
+In the Home Assistant Core 2022.3 release, we add custom features for the [tile card](https://www.home-assistant.io/dashboards/tile/). If you are a developer of custom cards, you can now build your own features to the tile card instead of building a whole card.
+
+![Screenshot showing example of custom tile feature](/img/en/blog/2023-02-28-custom-tile-features/example.png)
+
+```yaml
+type: tile
+entity: button.push
+features:
+  - type: custom:button-press-tile-feature
+```
+
+Custom tile features can even be added to the tile card editor like any other built-in tile feature using similar syntax as custom cards.
+
+```js
+window.customTileFeatures = window.customTileFeatures || [];
+window.customTileFeatures.push({
+  type: "button-press-tile-feature",
+  name: "Button press",
+});
+```
+
+For more details, see the [custom tile features](/docs/frontend/custom-ui/custom-card/#tile-features) documentation.