Add wpt tests badges to README.md

Author: beaufortfrancois

README.md

@@ -1,3 +1,12 @@
+
+# Capture Handle 
+
+[![WPT Chrome](https://wpt-badge.glitch.me/?product=chrome&prefix=/mediacapture-handle/)](https://wpt.fyi/results/mediacapture-handle)
+[![WPT Firefox](https://wpt-badge.glitch.me/?product=firefox&prefix=/mediacapture-handle/)](https://wpt.fyi/results/mediacapture-handle)
+[![WPT Safari](https://wpt-badge.glitch.me/?product=safari&prefix=/mediacapture-handle/)](https://wpt.fyi/results/mediacapture-handle)
+
+https://w3c.github.io/mediacapture-handle/
+
 This repo hosts two separate documents.
 1. [Capture Handle Identity](https://github.com/w3c/mediacapture-handle/tree/main/identity)
 2. [Capture Handle Actions](https://github.com/w3c/mediacapture-handle/tree/main/actions)