fix(html): move @videojs/icons to devDependencies

PR #698 (feat(skin)) added @videojs/icons to dependencies instead of
devDependencies, causing `No matching version found for
@videojs/icons@10.0.0-alpha.5` errors for consumers. Icons are bundled
at build time and not needed at runtime.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: decepulis

packages/html/package.json

@@ -89,13 +89,13 @@
   "dependencies": {
     "@videojs/core": "workspace:*",
     "@videojs/element": "workspace:*",
-    "@videojs/icons": "workspace:*",
     "@videojs/skins": "workspace:*",
     "@videojs/store": "workspace:*",
     "@videojs/utils": "workspace:*"
   },
   "devDependencies": {
     "@testing-library/dom": "^10.4.0",
+    "@videojs/icons": "workspace:*",
     "happy-dom": "^18.0.1",
     "tsdown": "^0.20.3",
     "typescript": "^5.9.3",