Add babel-macro

[artalar]

The macro must wrap all the core types and add a possibility to call it with as a template strings.

import { t } from "@rtcad/macro";

const type1 = t.String` string description `
const type2 = t.Object` shape description `({ prop: t.Number })

/**
 * COMPILE TO:
 * 1) `const type1 = t.String`, `const type2 = t.Object({ prop: t.Number })`
 * 2) File `out.md` with content `string description\n> string \n shape description\n>{ prop: number } \n`
 */