Implemented add-new-reservation functionality

[BryteLitty]

In this PR, I did the following:

• Implemented a functionality that takes data from the front end and records it in the involvement API.
• created a function that updates the Reservations section on the modal page with reservation info on the selected item

[Ofarouq310]

Status: Approved ✔️

Hi @BryteLitty ,

Your milestone is complete! There is nothing else to say other than... it's time to merge it
Congratulations! 🎉

Highlights

✔️No linter errors.
✔️Correct GitHub Flow.
✔️Milestone worked as expected.

Optional suggestions

Every comment with the [OPTIONAL] prefix won't stop the approval of this PR. However, I strongly recommend you to take them into account as they can make your code better. Some of them were simply missed by the previous reviewer and addressing them will really improve your application.

• [OPTIONAL] To improve the UI more, in case of entering a date that is invalid, you can display an error message to the user or a similar idea that will satisfy the suggestion.

Cheers and Happy coding!👏👏👏

Feel free to leave any questions or comments in the PR thread if something is not 100% clear.
Please, remember to tag me in your question so I can receive the notification.

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