refactor(common): CHECKOUT-4485 Fix inconsistency in import statements by using eslint-plugin-import plugin

Author: davidchin

.eslintrc.json

@@ -0,0 +1,40 @@
+{
+    "extends": [
+        "plugin:import/errors",
+        "plugin:import/typescript",
+        "plugin:import/warnings"
+    ],
+    "env": {
+        "browser": true
+    },
+    "parser": "@typescript-eslint/parser",
+    "parserOptions": {
+        "project": "./tsconfig.json",
+        "ecmaFeatures": {
+            "modules": true
+        },
+        "ecmaVersion": 6,
+        "sourceType": "module"
+    },
+    "plugins": [
+        "@typescript-eslint/tslint"
+    ],
+    "rules": {
+        "@typescript-eslint/tslint/config": [
+            "error",
+            {
+                "lintFile": "./tslint.json"
+            }
+        ],
+        "import/no-internal-modules": [
+            "error",
+            {
+                "allow": [
+                    "**/*.{mock,scss}",
+                    "**/index.ts",
+                    "rxjs/**"
+                ]
+            }
+        ]
+    }
+}