feat: exposeConfig to reference resolved config in javascript runtime

[pi0]

closes #62

---

It can often be useful to reference tailwind configuration values in runtime. For example to access some of your theme values when dynamically applying inline styles in a component.

If you need resolved tailwind config in runtime, you can enable exposeConfig option in nuxt.config:

// nuxt.config.js
{
  tailwindcss: {
    exposeConfig: true
  },
}

Then import where needed from ~tailwind.config:

// Import fully resolved config
import tailwindConfig from '~tailwind.config'

 // Import only part which is required to allow tree-shaking
import { theme } from '~tailwind.config'

NOTE: Please be aware this adds ~19.5KB (~3.5KB) to the client bundle size.

[codecov]

Codecov Report

Merging #69 into master will increase coverage by 0.43%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master      #69      +/-   ##
==========================================
+ Coverage   97.43%   97.87%   +0.43%     
==========================================
  Files           3        3              
  Lines          39       47       +8     
  Branches        8        9       +1     
==========================================
+ Hits           38       46       +8     
  Misses          1        1

Impacted Files	Coverage Δ
lib/module.js	96.77% <100%> (+1.12%)	⬆️

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