Improved linear search: return index, input validation, multpile queries

[inesh126]

This pull request improves the existing linear search implementation by:

Changing the return value to the index of the found element instead of just 1/0, allowing users to know the exact position.

Adding input validation to handle edge cases, such as empty arrays.

Modifying the program to allow multiple search queries without restarting.

Enhancing code readability with comments and cleaner variable names.

These improvements make the linear search function more useful and the program more user-friendly.

[inesh126]

Hi, Im new here and this is my first PR
Id love to get to interact about anything and any helpful guidance
Thank You!

[github-actions]

This pull request has been automatically marked as abandoned because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[github-actions]

Please ping one of the maintainers once you commit the changes requested or make improvements on the code. If this is not the case and you need some help, feel free to ask for help in our Gitter channel or our Discord server. Thank you for your contributions!