Add or update GitHub pull request and issue template

.github/ISSUE_TEMPLATE/SUPPORT_QUESTION.md

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+---
+name: 💬 Support Question
+about: If you have a question, please check out our Slack or StackOverflow!
+
+---
+
+<!------------^ Click "Preview" for a nicer view! -->
+
+Apache Cordova uses GitHub Issues as a feature request and bug tracker _only_.
+For usage and support questions, please check out the resources below. Thanks!
+
+---
+
+You can get answers to your usage and support questions about **Apache Cordova** on:
+
+* Slack Community Chat: https://cordova.slack.com (you can sign-up at http://slack.cordova.io/)
+* StackOverflow: https://stackoverflow.com/questions/tagged/cordova using the tag `cordova`
+
+---
+
+If you are using a tool that uses Cordova internally, like e.g. Ionic, check their support channels:
+
+* **Ionic Framework**
+  * [Ionic Community Forum](https://forum.ionicframework.com/)
+  * [Ionic Worldwide Slack](https://ionicworldwide.herokuapp.com/)
+* **PhoneGap**
+  * [PhoneGap Developer Community](https://forums.adobe.com/community/phonegap)