continue #199: redesign the bundled file structure

According to @eoghanmurray's suggestion, we can support three
main scenarios:
1. record only
2. replay only
3. all in one

Since we have implemented the packer feature, which has a big
influence in bundle size, we provide another three bundles:
1. record and pack
2. replay and unpack
3. all in one with pack and unpack

package.json

@@ -17,8 +17,8 @@
   "keywords": [
     "rrweb"
   ],
-  "main": "lib/rrweb-boost.js",
-  "module": "es/rrweb/src/boost.js",
+  "main": "lib/rrweb-all.js",
+  "module": "es/rrweb/entries/all.js",
   "unpkg": "dist/rrweb.js",
   "sideEffects": false,
   "typings": "typings/index.d.ts",