Revert "integrate @umbraco-cms/element and @umbraco-cms/context-api due to circular dependencies"

This reverts commit e87439ff5f.

src/Umbraco.Web.UI.Client/libs/controller/package.json

@@ -0,0 +1,16 @@
+{
+	"name": "@umbraco-cms/controller",
+	"version": "0.0.0",
+	"description": "",
+	"module": "dist/index.js",
+	"type": "module",
+	"files": [
+		"dist"
+	],
+	"scripts": {
+		"build": "rollup -c",
+		"test": "echo \"Error: no test specified\" && exit 1"
+	},
+	"author": "Umbraco HQ",
+	"license": "MIT"
+}