Add GitHub issue templates

.github/ISSUE_TEMPLATE/bug_report.md

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+---
+name: Bug report
+about: Create a report to help us improve
+title: ''
+labels: ''
+assignees: ''
+
+---
+
+**Issue description:**
+<!-- A clear and detailed description of the issue. Please do not post things like "it does not work". -->
+
+**Kodi debug log:**
+<!-- See here: https://kodi.wiki/view/Log_file/Easy
+This is a mandatory item and a regular (non-debug) log is not enough! Bug reports without debug logs may be closed without explanation. 
+Please do not copy-paste logs but attach them as files to the ticket or use
+Kodi pastebin: https://paste.kodi.tv.
+-->
+
+**Additional context**
+<!-- Add any other context about the problem here. -->

.github/ISSUE_TEMPLATE/feature_request.md

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+---
+name: Feature request
+about: Suggest an idea for this project
+title: ''
+labels: ''
+assignees: ''
+
+---
+
+<!-- Please provide explanation of why do you think this feature is necessary -->