♻️(typescript) move tokens sources to absolute import

Relatives import are quite ugly and reduces readability, but
hard to say that Typescript handles it very well for compilation
time, but nothing for runtime. That's why I had to add tsc-alias
to the build script. Please see this issue for more details.
https://github.com/Microsoft/TypeScript/issues/15479
Furthermore, some configuration was needed for Jest to work well.

packages/tokens/src/bin/ConfigLoader.ts

@@ -1,9 +1,9 @@
 import path from "path";
 import * as fs from "fs";
 import deepmerge from "deepmerge";
+import { ConfigShape } from "TokensGenerator";
+import { workPath } from "Paths";
 import Config from "./Config";
-import { ConfigShape } from "./TokensGenerator";
-import { workPath } from "./Paths";
 
 const getLocalConfig = async () => {
   const filename = Config.configurationFilenames