feat: added greetings workflow

.github/workflows/greetings.yml

@@ -0,0 +1,22 @@
+name: 'Greetings'
+
+on:
+  fork:
+  push:
+    branches: [main]
+  issues:
+    types: [opened]
+  pull_request_target:
+    types: [opened]
+
+jobs:
+  welcome:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v1
+      - uses: EddieHubCommunity/gh-action-community/src/welcome@main
+        with:
+          github-token: ${{ secrets.GITHUB_TOKEN }}
+          issue-message: 'Congratulations, @${{ github.actor }}! 🎉 Thank you for creating your issue. Your contribution is greatly appreciated and I look forward to work with you to resolve the issue. Keep up the great work!'
+          pr-message: 'Great job, @${{ github.actor }}! 🎉 Thank you for submitting your first pull request. Your contribution is valuable and I appreciate your efforts to improve my project.'
+          footer: 'I will promptly review your changes and offer feedback. Keep up the excellent work! Kindly remember to check my [contributing guidelines](https://github.com/dakshsinghrathore/ISRO-web/blob/main/CONTRIBUTING.md)'