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.

tools/cli/tsconfig.json

@@ -6,5 +6,6 @@
     "moduleResolution": "Node",
     "outDir": "lib"
   },
-  "include": ["src"]
+  "include": ["src", "package.json"],
+  "references": [{ "path": "../../packages/common/env" }]
 }