added missing searching algos

[ravi5175]

Description

Algos implemented - 1 - Exponential Search 2 - Recursive Array Search

Test Case implemented - 1 - Exponential Search Test 2 - Recursive Search Test

Fixes #23

Type of Change:

• Code

How Has This Been Tested?

• All test cases (newer and previous ones) passing

Checklist:

• [* ] I read the CONTRIBUTING document before making this pull request
• [ *] My code follows the style guidelines of this project
• [ *] I have performed a self-review of my own code or materials
• [ *] I have commented my code or provided relevant documentation, particularly in hard-to-understand areas
• [ *] My change requires a change to documentation
• [ ] I have updated documentation accordingly
• [] I have updated the requirements file
• [* ] My changes generate no new warnings
• [ ] My PR currently breaks something (fix or feature that would cause existing functionality to not work as expected)
• [ *] I have added tests to cover my changes
• [ *] All new and existing tests passed.