Added config file for welcome bot

Author: musavveer

.github/config.yml

@@ -0,0 +1,17 @@
+newPRWelcomeComment: >
+  Thank you 🎉 for opening this pull request!💖
+  Please make sure you have followed our Contributing Guidelines.🙌
+  We will test out your code and reply in a bit with some pointers and requests.💿
+  There may be some errors, **but don't worry!** We'll work through them with you! 👍🎉😄
+  If you haven't filled the template out, Please do so!🚀
+
+
+firstPRMergeComment: >
+  Congrats on merging your first pull request! 🙌🎉⚡️
+  Now that you've merged your first pull request, you're the perfect person to help someone else out with this challenging first step.😄🙌
+
+
+newIssueWelcomeComment: >
+  Hello there!👋 Welcome to the project!🚀⚡
+  Thank you and congrats🎉 for opening your very first issue in this project. Please adhere to our Code of Conduct.
+  Please make sure not to start working on the issue, unless you get assigned to it.😄