Create basic issue templates (#1260)

* Create basic issue templates

Co-authored-by: Nordsoft91 <nordsoft@yahoo.com>
Co-authored-by: Andrey Filipenkov <decapitator@ukr.net>

.github/ISSUE_TEMPLATE/bug_report.md

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+---
+name: Bug report
+about: Report an issue to help us improve
+title: ''
+labels: ["bug"]
+assignees: ''
+
+---
+
+**Describe the bug**
+A clear and concise description of what the bug is.
+
+**Game logs**
+Please attach game logs: `VCMI_client.txt`, `VCMI_server.txt` etc.
+
+**To Reproduce**
+Steps to reproduce the behavior:
+1. Go to '...'
+2. Click on '....'
+3. Scroll down to '....'
+4. See error
+
+**Expected behavior**
+A clear and concise description of what you expected to happen.
+
+**Actual behavior**
+A clear description what is currently happening 
+
+**Did it work earlier?**
+If this something which worked well some time ago, please let us know about version where it works or at date when it worked.
+
+**Screenshots**
+If applicable, add screenshots to help explain your problem.
+
+**Version**
+ - OS: [e.g. Windows, macOS Intel, macOS ARM, Android, Linux, iOS]
+ - Version: [VCMI version]
+
+**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 improvement
+title: ''
+labels: ["enhancement"]
+assignees: ''
+
+---
+
+**Describe your proposal**
+Give us as many as possible details about your idea.
+
+**Additional context**
+Add any other context or screenshots about the feature request here.