Add files via upload

[Roy-Shubhajit]

Description

Added python script for checksum and signature generation and verification

Fixes #[ISSUENO]

Dependencies

os, sys, hmac, base64, hashlib, argparse

Future Improvements

Mentions

Screenshots of relevant screens

Developer's checklist

• My PR follows the style guidelines of this project
• I have performed a self-check on my work

If changes are made in the code:

• I have followed the coding guidelines
• My changes in code generate no new warnings
• My changes are breaking another fix/feature of the project
• I have added test cases to show that my feature works
• I have added relevant screenshots in my PR

[github-actions]

Thank you for opening your first pull request in our repository, one of our maintainers will get in touch with you soon.

PLEASE DON'T FORGET TO ADD YOUR EMAIL USING THE AUTH LINK

We at Metafy have some special rewards and swags for the top contributors in general repos and every contributor in web3 repos
For being eligible for that, please authenticate yourself using this link:
https://metafy.social/signup

Rewards : T-shirts & NFT ( for blockchain contributions )

Best of luck on your Contributions
For further queries you can join our discord for support : https://discord.gg/W6PmEjjQsA

[github-actions]

PR is not linked to any issue, please make the corresponding changes in the body.

[Roy-Shubhajit]

@bartick, Can you please review the above Pull request and approve it?

[bartick]

Sorry we can't accept this PR. This issue was already assigned to someone else.

Also please open a suitable issue before creating a PR from next time