theme color token

<p>⭐️️ Help you generate sys tokens for all themes, based on the token links from a full theme.</p><ul><li>ref color example: [themeName]/ref/blue-50</li><li>sys color example: [themeName]/sys/primary</li></ul><p><br></p><p>👋🏻️ Steps to use this plugin:</p><ol><li>Create a full theme (ref &amp; sys) in color style, make sure the folder dir matching the structure above.</li><li>Create other theme's ref color palette.</li><li>Choose the full theme as the basic theme, the plugin will automatically get token links.</li><li>Click 'generate' to generate sys tokens based on the token links for all themes.</li></ol><p><br></p><p>✨️ Tips:</p><ol><li>'generate' will skip theme which already have sys folder, so you don't have to create empty sys folder.</li></ol><p><br></p><p>📣️ New Feature:</p><ul><li>Importing color styles from external palette(eg. <a href="https://colors.eva.design/" rel="noreferrer noopener nofollow ugc" target="_blank">eva color palette</a>) via JSON file.</li></ul>