docs: 📝 Add Metadata section in Settings

apps/docs/docs/editor/settings.mdx

@@ -13,7 +13,7 @@ The general settings represent the general behaviors of your typebot.
 
 ## Typing emulation
 
-By default, your typebot will emulate a certain typing speed. It is considered a good default as slow as a human typing speed and it's not too fast so that multiple bubble can be readable sequentially.
+By default, your typebot will emulate a certain typing speed. It is considered a good default as slow as a human typing speed and it's not too fast so that multiple bubbles can be read sequentially.
 
 You can customize this typing speed in the settings:
 
@@ -32,3 +32,9 @@ return new Promise((res) => setTimeout(res, 3000))
 ```
 
 You can tweak `3000` (3s) to your liking.
+
+## Metadata
+
+In the Metadata section, you can customize how the preview card will look if you share your bot URL on social media for example.
+
+You can also add some custom head code to add third-party scripts like a Facebook pixel for example.