added script

scripts/twitch-click-mute/main.ts

@@ -0,0 +1,15 @@
+addEventListener('load', () => {
+    document.body.addEventListener('click', e => {
+        let target = e.target as HTMLElement | null
+        if (
+            target &&
+            target.getAttribute('data-a-target') ===
+                'player-overlay-click-handler'
+        ) {
+            let video = document.querySelector('video')
+            if (video) {
+                video.muted = !video.muted
+            }
+        }
+    })
+})