Added Transformer

[bhanushri12]

Closes: #56

• Title : Add new algorithm and update README with Transformer algorithm
• Name: Bhanushri Chinta
• Identify yourself: SSoC contributor

Describe the add-ons or changes you've made 📃

Added a new algorithm under the NLP algorithm section and updated the README to include information about the Transformer algorithm.

Type of change ☑️

What sort of change have you made:

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Code style update (formatting, local variables)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

How Has This Been Tested? ⚙️

Manually tested the new algorithm implementation and verified the README update locally.

Checklist: ☑️

• My code follows the Contributing Guidelines & Code of Conduct of this project.
• This PR does not contain plagiarized content.
• I have performed a self-review of my own code.
• I have commented my code, particularly wherever it was hard to understand.
• My changes generate no new warnings.

Note to reviewers 📄

Please review the new algorithm implementation and ensure the README update accurately reflects the changes made.

[github-actions]

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[bhanushri12]

@Avdhesh-Varshney I wanted to know if there are any conflicts?

[Avdhesh-Varshney]

@bhanushri12 nope, no conflicts and properly read the guidelines before raising the pr.