Add alias config for path

[risenW]

import Image from "../../src/image/image-proc";
import {stdCalc} from "../../src/image/utils";
import Image from "../../../src/image/image-proc";
import {stdCalc} from "../../../src/image/utils";

This relative path looks too long, shall we have an alias config for the directory "../../../src" as "@/image/utils"?

Suggestion: Usen the package module-alias

[yorkie]

The "@/image/utils" conflicts with NPM scoped package, may we have another choose just like ~?