Feat 3960 kotlin send message function

[ArtP1]

Co-authored by @jamesrcramos & @softTam

What does this PR do?

This PR adds a new Kotlin cloud function, called sendMessage(), to the Open Runtimes Examples repository.

The features will include:

1. The ability to send messages to a recipient using Email, SMS, Discord, and Twitter.

Test Plan

Manual executions using cURL commands:

1. SMS

2. Mail

3. Discord

4. Twitter

Related PRs and Issues

⚡ Write a sendMessage() Function using Kotlin #3960

Checklist

• [x] Ask to be assigned to the issue.
• [x] Implement function sendMessage() in Kotlin/ folder.
• [x] Manually execute the newly implemented function to ensure it works.
• [x] Submit a pull request in open-runtimes/examples and include screenshots of successful execution.