feat: Create config file for welcome bot

[m-code12]

Description

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.( Can only be done by a member of the org)

Fixes #649

Type of Change:

Delete irrelevant options.

• Code

Code/Quality Assurance Only [x] Bug fix (non-breaking change which fixes an issue) [x] New feature (non-breaking change which adds functionality pre-approved by mentors)

How Has This Been Tested?

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

Checklist:

Delete irrelevant options.

• [x] My PR follows the style guidelines of this project
• [x] I have performed a self-review of my own code or materials
• [x] I have commented my code or provided relevant documentation, particularly in hard-to-understand areas

Code/Quality Assurance Only

• [x] My changes generate no new warnings
• [ ] My PR currently breaks something (fix or feature that would cause existing functionality to not work as expected)
• [x] I have added tests that prove my fix is effective or that my feature works
• [x] New and existing unit tests pass locally with my changes
• [ ] Any dependent changes have been published in downstream modules

[codecov-io]

Codecov Report

Merging #684 into develop will not change coverage. The diff coverage is n/a.

@@           Coverage Diff            @@
##           develop     #684   +/-   ##
========================================
  Coverage    89.99%   89.99%           
========================================
  Files           49       49           
  Lines         2699     2699           
========================================
  Hits          2429     2429           
  Misses         270      270           

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[m-code12]

@SanketDG Please could you review this pr?

[m-code12]

@sakshi1499 I have amended the commit message, even then it's failing. What should I do, could you help me out?

[m-code12]

I am trying again and again but still the commit check is failing. If you could amend it from your end it would be of great help @sakshi1499 @SanketDG

[m-code12]

@sakshi1499 @devkapilbansal I am closing this pr and have opened a new pr #690 where all the checks have passed.