feat: Added config.yml file for welcome bot

[m-code12]

Fixes #30

What is the change?

Created config.yml file for the welcome bot to help first-time contributors. To activate the app you need to go to https://github.com/apps/welcome and click on install and give the app the required permissions (Pull requests: Read & Write Issues: Read & Write).

How was it tested?

I have tested the welcome bot with the config.yml file in my personal repository. Here is a link to the repo: https://github.com/m-code12/WelcomeBot

Submissions guide:

• [ ] Have you made corresponding changes to the documentation?
• [x] Your submission doesn't break any existing feature.
• [ ] Have you lint your code locally prior to submission?

[sansyrox]

@m-code12 , how is the bot triggered?

I've tried creating an issue on your repo. Doesn't seem to work 🤔

[sansyrox]

Merging it right now. Will revert if doesn't work.

[welcome[bot]]

Congrats on merging your first pull request! 🎉 All the best for your amazing open source journey ahead 🚀.

[m-code12]

Merging it right now. Will revert if doesn't work.

Alright.

[sansyrox]

Alriggttt Workss. good job @m-code12 🔥