Fix typos and improve formatting in README

[dimpal-yadav]

Description:
Some minor typos and inconsistent heading formatting exist in README.md. Fixing these will make the documentation easier to read for new contributors.

Proposed Solution:
Correct spelling and grammar mistakes.
Standardize headings (##, ###).
Ensure consistent bullet points and spacing.

Acceptance Criteria:
All typos corrected.
Headings formatted consistently.
README is visually cleaner and easier to read.

[diksha78dev]

Hi, I am GSSOC'25 contributer. Can assign this issue to me?

[ratna-jaiswal]

@dimpal-yadav are u working on it
or i should assign it to @Diksha78-bot

[dimpal-yadav]

Yes, I'm working on it
Assign me

[ratna-jaiswal]

assigned @dimpal-yadav