Dark mode integration & fix button issue in TE-STARTER (ZIP), CDN and MDB GO Starter

[smolenski-mikolaj]

I guess here's a working solution for TE-STARTER and CDN:

tailwind.config = {
  darkMode: "class",
  theme: {
    fontFamily: {
      sans: ["Roboto", "sans-serif"],
      body: ["Roboto", "sans-serif"],
      mono: ["ui-monospace", "monospace"],
    },
  },
  corePlugins: {
    preflight: false,
  },
};