Add: "auto-label" GitHub Workflow for Automated Labeling

[samyak-aditya]

Objective: Implement an "auto-label" GitHub workflow to automatically assign the "gssoc-ext" and "hacktoberfest-accepted" labels to relevant pull requests and issues.

Details:

• This workflow will streamline the labeling process by automatically applying the "gssoc-ext" and the "hacktoberfest-accepted" label to Issues.
• By automating these labels, we can ensure consistent tracking and visibility of contributions tied to these significant events.

Implementing this "auto-label" workflow will enhance project organization

[samyak-aditya]

hey @PranavBarthwal Please Assign it to me with label "gssoc-ext" , "hacktoberfest-accepted" and "level2"