feat(icons): added circle-fading-play icon (#4990)

* feat(icons): added `circle-fading-play` icon

Adds a play button in a fading circle, completing the circle-fading-*
family (circle-fading-plus, circle-fading-arrow-up). Useful for short
clips, highlights, stories/reels and video previews.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

* chore(icons): add use-cases and tags to `circle-fading-play`

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

* chore(icons): credit contributors of base icons for `circle-fading-play`

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

* Update circle-fading-play.json

---------

Co-authored-by: tatianatsiguleva <324940161+tatianatsiguleva@users.noreply.github.com>
Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
Co-authored-by: Karsa <contact@karsa.org>

icons/circle-fading-play.json

@@ -0,0 +1,35 @@
+{
+  "$schema": "../icon.schema.json",
+  "contributors": [
+    "tatianatsiguleva",
+    "jordan808",
+    "jguddas",
+    "colebemis",
+    "karsa-mistmere"
+  ],
+  "use-cases": [
+    "Indicating short-form video clips in media browsing interfaces",
+    "Representing preview or teaser playback for video thumbnails",
+    "Providing an entry point for stories, reels, or shorts in social apps",
+    "Marking auto-generated clips from live streams or long recordings"
+  ],
+  "tags": [
+    "short clips",
+    "shorts",
+    "reels",
+    "stories",
+    "video",
+    "highlights",
+    "social media",
+    "content",
+    "preview",
+    "teaser",
+    "clip",
+    "short form",
+    "vertical video"
+  ],
+  "categories": [
+    "multimedia",
+    "social"
+  ]
+}

icons/circle-fading-play.svg

@@ -0,0 +1,18 @@
+<svg
+  xmlns="http://www.w3.org/2000/svg"
+  width="24"
+  height="24"
+  viewBox="0 0 24 24"
+  fill="none"
+  stroke="currentColor"
+  stroke-width="2"
+  stroke-linecap="round"
+  stroke-linejoin="round"
+>
+  <path d="M12 2a10 10 0 0 1 7.38 16.75" />
+  <path d="M9 9.003a1 1 0 0 1 1.517-.859l4.997 2.997a1 1 0 0 1 0 1.718l-4.997 2.997A1 1 0 0 1 9 14.996z" />
+  <path d="M2.5 8.875a10 10 0 0 0-.5 3" />
+  <path d="M2.83 16a10 10 0 0 0 2.43 3.4" />
+  <path d="M4.636 5.235a10 10 0 0 1 .891-.857" />
+  <path d="M8.644 21.42a10 10 0 0 0 7.631-.38" />
+</svg>