Update issue templates

.github/ISSUE_TEMPLATE/feature_request.md

@@ -0,0 +1,24 @@
+---
+name: Feature request
+about: Suggest a new Source, setting, or other feature.
+title: ''
+labels: enhancement, To Check
+assignees: ''
+
+---
+
+**Prerequisites**
+Please ensure your request is not part of an existing issue.
+
+**Describe the feature**
+A clear and concise description of what you want to happen.
+
+For new Sources, it's preferable (not required) if you suggest how an App ID (or any release-specific identifier), App version, and APK URL(s) could be scraped from the Source.
+
+**Describe alternatives you've considered (if applicable)**
+A clear and concise description of any alternative solutions or features you've considered.
+
+Note that app-specific Sources are less likely to be added. In those cases, see if the HTML Source will work for you (if not, see if a generally-applicable enhancement to the HTML Source would work, and suggest that instead).
+
+**Additional context**
+Add any other context or screenshots about the feature request here.