feat: workflow for auto-comment when pull request opens

[Asymtode712]

Fixes #40

@harmeetsingh11 please review and merge this PR

Also, please add labels and assign me this PR

Thank You!

[Asymtode712]

@harmeetsingh11 Hey harmeet, I guess you should change your "GSSOC'24" label to "GSSoC'24" label because my merged PRs on your repo aren't visible on the leaderboard

Thank you!

[harmeetsingh11]

Done ✅ Hi @Asymtode712 two of your workflows are not working as expected. The PR are #48 and #50. Can you please look into it?

[Asymtode712]

@harmeetsingh11 ok I am looking into it

[Asymtode712]

@harmeetsingh11 So i checked both, #50 hasn't runned yet because no new PR has been raised since #50 was merged and for removing #48's failure please follow the below steps:

Step 1: Create a Personal Access Token (PAT) with repo Permission

1. Navigate to Settings:

• Click on your profile picture in the upper-right corner of the page.
• Select "Settings" from the dropdown menu.

2. Go to Developer Settings:

• In the left sidebar, scroll down and click on "Developer settings."

3. Create a New Token:

• Click on "Personal access tokens -> Token (classic)" in the left sidebar.
• Click on the "Generate new token" button.

4. Configure the Token:

• Token Description: Enter a descriptive name for the token (e.g., Repo Access Token).
• Expiration: Set no expiration.
• Select Scopes: Check the box next to repo to grant full control of private repositories.

5. Generate Token:

• Scroll down and click on the "Generate token" button.
• Important: Copy the token to a secure location. You will not be able to see it again once you navigate away from the page.
  

Step 2: Assign the Token to GITHUB_TOKEN Environment Variable

1. Navigate to Your Repository:

• Go to your repository on GitHub.
• Click on the "Settings" tab.

2. Go to Secrets:

• In the left sidebar, click on "Secrets and variables" and then "Actions".

3. Create a New Secret:

• Click on the "New repository secret" button.
• Name: Enter GITHUB_TOKEN.
• Value: Paste your generated token.
• Click on the "Add secret" button.