feat: parallelise async calls and fixes

[ineshbose]

Same as #679 except it reverts using await import() due to regression uses tailwindcss/loadConfig now (that specialises in loading ESM/TS configs with the help of jiti) 🙂

• fixes Can't resolve #build/tailwind.config/* #680
• fixes content property required in config #519

Play on Stackblitz - https://stackblitz.com/github/ineshbose/nuxt-tailwindcss-module/tree/refactor0

[nuxt-studio]

✅ Live Preview ready!

Name	Edit	Preview	Latest Commit
TailwindCSS	Edit on Studio ↗︎	View Live Preview	3f69fac

[what-the-diff]

PR Summary

• Added a new configuration key
  A new key was added to the package.json file for better customization.
• Improved compatibility
  Changes were made to the compatibility section in package.json.
• Updated documentation
  Documentation for Nuxt module authors was updated in the tailwindcss hooks.
• Fixed theme file issues
  Playground theme file extension was changed, and imports were updated.
• Replaced server handler
  Removed addDevServerHandler and now using Nuxt's built-in server middleware.
• Used new resolver API
  Improved path resolution for configPaths, cssPath, and more using the new resolver API.
• Added a hook for extending tailwindConfig
  New hook allows other modules to extend tailwindConfig before TailwindCSS processes it.
• Fixed type errors
  Resolved type errors in moduleOptions types definition file.
• Improved configuration path resolution
  Added resolveModulePaths to properly handle paths for all layers.
• Enhanced template creation
  Added createTemplates function for better export and alias handling in the nuxt app.
• Fixed HMR issue
  Resolved an issue with HMR not working properly when using custom CSS files.
• Updated viewer.ts and vite-hmr files
  Made necessary updates for compatibility and fixed test cases.
• Fixed Windows path issues
  Resolved path issues causing test failures on Windows machines.