refactor(core): split web entry from core (#6082)

This pr is trying to split `web` and `electron` entries from `core`. It allows more platform-related optimization to be addressed in each entry.
We should remove all browser/electron only codes from `core` eventually, this is the very first step for that.

.github/actions/download-web/action.yml

@@ -11,7 +11,7 @@ runs:
     - name: Download tar.gz
       uses: actions/download-artifact@v4
       with:
-        name: core
+        name: web
         path: .
 
     - name: Extract core artifacts