[Improvement] Revamped UI/UX for the Extension

[Roaster05]

Purpose:

This pull request is linked to issue #2 and revolves around refining the proposed user interface.

Implementation:

We've integrated the tailwind CSS library, utilizing its CDN file locally named tailwindcss.js within the scripts folder. Subsequently, we've made modifications to the following key HTML files:

• index.html: Primarily focuses on the core layout of the popup, featuring a prominent "Fireup" button for redirection to text_input.html.
• text_input.html: This page is dedicated to user input, housing a responsive textarea and an engaging dots animation for loading feedback. Additionally, it includes essential navigation buttons such as Next, Back, and Upload-File.
• question_generation.html: Introduces a modal interface presenting all generated questions. Alongside, it offers functionalities like View, Save, and Back for seamless interaction.

Moreover, to streamline resource accessibility, we've centralized our public assets within the designated assets folder, ensuring easy integration across our HTML files.

Present State:

For a comprehensive understanding of the UI/UX refinements, a screencast showcasing the entire transformation has been provided.

Screencast.from.2024-03-21.01-56-24.webm