Fix: Improve formatting and structure of CONTRIBUTING.md

[Gavali197]

Increasing Access

How does this increase access?

Improving the structure and readability of CONTRIBUTING.md makes it
easier for:

• New contributors who are not familiar with the codebase
• Non-native English speakers who need clear formatting to follow along
• Contributors using screen readers or assistive tools where
  proper markdown structure matters

Feature enhancement details

Summary

The CONTRIBUTING.md file has inconsistent spacing and uneven formatting
that makes it harder to read, especially for new contributors.

Proposed Changes

• Add proper blank lines between sections
• Consistent list formatting throughout
• No words or links changed — structure only

Why

First-time contributors rely heavily on this file.
Clean formatting makes it easier to navigate.

[Nishthajain7]

There are also 2 typos in the file

1. Acitivities on Line 24 must be correctly spelled as activities
2. Feel free to ask questions about how to approach. "how" is missing on line 58