Added order agnostic Binary Search in cpp

[ritikakatoch]

Have you read the Contributing Guidelines on Pull Requests?

(Write your answer here.) Hey, I have contributed order agnostic binary search. Kindly review that and merge.

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Checklist

• [x] I've read the contribution guidelines.
• [x] I've checked the issue list before deciding what to submit.
• [x] I've edited the README.md and link to my code.

Related Issues or Pull Requests

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[ritikakatoch]

Hey @iamrajiv , I have contributed order agnostic binary search in cpp. Kindly review it and merge.

[ritikakatoch]

@Ritikakatoch0128 remove .deepsource.toml file.

Heya @iamrajiv , I have removed the file.