feat(ui): Overhaul UI, Expand Language Support, and Clean Repository

[Ri796]

Hi @Ansikka,

This is a comprehensive Pull Request that resolves two open issues by completely overhauling the application's UI/UX and significantly expanding its language support.

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Expanded Language Support (Closes #71)

This PR fully implements the proposal from Issue #71 and goes even further by adding more languages to improve accessibility.

• ✅ New Languages Added:

  • Added full translation dictionaries for Bengali (bn), Odia (or), and Assamese (as) ,Manipuri (mni), Malayalam (ml), and Tulu (tcy) as well.

• 🛠️ Implementation Details:

  • Updated the main translations dictionary with complete key-value pairs for all new languages.
  • Updated the language_options dictionary in the sidebar to make all new languages selectable by the user.

UI/UX Overhaul (Closes #69)

This PR implements all the suggested improvements from Issue #69 to transform the application from a technical demo into a polished, user-friendly product.

• 🧹 Clean, Restructured Layout:

  • Fixed the "Cluttered Layout" by moving all user inputs and filters into a dedicated sidebar (st.sidebar).
  • Organized the main content area into five logical, easy-to-navigate tabs.

• 📊 Improved Data Presentation:

  • Added clear headings, subheadings, and spacing to improve readability and content flow.
  • Hidden Raw JSON: All raw data is now processed by the backend, and only clean, user-friendly results are shown.

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This work addresses requirements from both issues, making the application more professional, accessible, and easier to use.

Looking forward to your feedback!