Added expense splitter extension

[Archiesachin]

Description

Added an expense splitter which will take input of who paid how much money and calculate and tell who owes who how much.

Fixes: #2594

Type of change

• New feature (non-breaking change which adds functionality)

Checklist:

• I have made this from my own
• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings

ATTACH SCREEN-SHOTS / DEPLOYMENT LINK

[github-actions]

Thank you for submitting your pull request! 🙌 We'll review it as soon as possible. In the meantime, please ensure that your changes align with our CONTRIBUTING.md. If there are any specific instructions or feedback regarding your PR, we'll provide them here. Thanks again for your contribution! 😊

[Sulagna-Dutta-Roy]

How many points you earned from my repo @Archiesachin

[Archiesachin]

How many points you earned from my repo @Archiesachin

85 points. Can you please assign this PR and issue as level 2🥺. This is going to be my last PR in your repo. It was really fun working on this project☺️