Create v3 package.json for proper Used By count

Github scans repos to compute the Used By, and ionic 3 has more usage which we should get credit for so this adds a dummy `package.json` file for v3

.scripts/v3/package.json

@@ -0,0 +1,16 @@
+{
+  "name": "ionic-angular",
+  "version": "`gulp package` generates dist/package.json from this template using the root ./package.json",
+  "description": "",
+  "keywords": [],
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/ionic-team/ionic-v3.git"
+  },
+  "license": "MIT",
+  "main": "umd/index.js",
+  "module": "index.js",
+  "es2015": "es2015/index.js",
+  "peerDependencies": {
+  }
+}