chore: update issue template [skip-ci]

Author: softvar

.github/ISSUE_TEMPLATE/custom-issue-template.md

@@ -0,0 +1,26 @@
+---
+name: Custom Issue Template
+about: This project is no longer actively developed.
+title: ''
+labels: ''
+assignees: ''
+
+---
+
+### ⚠️ [DEPRECATED NOTICE]
+
+**⚠️ This project is no longer actively developed. ⚠️**
+
+**✅ We are only fixing critical bugs and security issues.**
+
+**❌ No new features, enhancements, or non-critical updates will be added.**
+
+#### Switch to *VWO Feature Management & Experimentation(FME)* – The Better Alternative! 🚀
+
+VWO’s FME product empowers teams to seamlessly test, release, optimize, and roll back features across their entire tech stack while minimizing risk and maximizing business impact.
+
+* Check out FME developer documentation [here](https://developers.vwo.com/v2/docs/fme-overview).
+* Check [this](https://developers.vwo.com/v2/docs/sdks-release-info ) for the list of all FME-supported SDKs.
+
+**💡 Need Help?**
+For migration assistance or any questions, contact us at [[email protected]]([email protected])