feat(codex-ui): codex-ui package base setup

[neSpecc]

CodeX UI

The design system implementation now belongs to this repo, at the codex-ui folder.

This folder contains the following structure:

src/
  styles/
    mixins/
      typography.pcss
    index.pcss
    colors.pcss
  vue/
    button/
      Button.vue
  react/
    ...
  web/
    ...
  js/
    ...

Usage example

You can check the usage example in the Home.vue page.

Here you can find following examples:

1. Page black colour — example of usage of CSS variable from codex-ui
2. Heading, Button and Input components — example of usage Vue components from codex-ui
   2.1 Heading component uses CSS mixin (typography.pcss) internally
   2.2 Components types and jsdocs are supported: