Updated Readme with latest techs

[nothariharan]

Title: docs: Expand README with comprehensive hackathon resources

Description:

What does this PR do?

This PR significantly expands the README.md to provide a comprehensive, end-to-end guide for beginner hackathon participants. It adds several new categories of tools and resources that cover the entire project lifecycle, from initial idea to final submission.

Why is this change essential?

The previous version of the README was helpful but focused primarily on the final stages of a project (UI/UX and Pitching). This left a major gap for beginners who need guidance on the crucial initial and middle stages.

This update is essential because it:

• Covers the Full Lifecycle: It introduces critical sections for Idea Generation, Development Setup, Backend & Databases, APIs, and Hosting, which are fundamental parts of any hackathon project.
• Empowers Beginners: By providing a curated list of accessible, free-tier-friendly tools, we lower the barrier to entry and help newcomers get started quickly without feeling overwhelmed.
• Creates a One-Stop Resource: This change transforms the repository from a small list of tools into a go-to, indispensable guide for anyone participating in a hackathon. It provides value at every step of the journey.
• Improves Project Quality: By exposing participants to tools for backend, APIs, and hosting, we encourage the creation of more robust, fully-functional projects.

How was this change implemented?

• Added 8 new sections to cover the entire hackathon workflow.
• Researched and included popular, beginner-friendly tools for each new category.
• Standardized the markdown formatting across the entire document for consistency and readability.
• Organized the sections logically to follow the natural progression of a hackathon project.

[nothariharan]

@rahavshukla do let me know if there are any changes required?

[rossyroads]

When can this be merged?