chore: add issue templates for bugs, features, and crashes

.github/ISSUE_TEMPLATE/bug_report.md

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+---
+name: Bug Report
+about: Something broken or not working as expected
+labels: bug
+---
+
+**What happened?**
+
+
+**Steps to reproduce**
+1.
+2.
+3.
+
+**Expected behavior**
+
+
+**Platform / Build**
+- OS:
+- Branch:
+- Commit (if known):
+
+**Screenshots / Logs**
+

.github/ISSUE_TEMPLATE/crash_report.md

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+---
+name: Crash Report
+about: Game crashes or freezes
+labels: crash, priority: high
+---
+
+**What were you doing when it crashed?**
+
+
+**Does it happen every time?**
+
+
+**Platform / Build**
+- OS:
+- Branch:
+- Commit (if known):
+
+**Crash log / stack trace**
+```
+
+```

.github/ISSUE_TEMPLATE/feature_request.md

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+---
+name: Feature Request
+about: Suggest an idea or improvement
+labels: feature request
+---
+
+**What would you like?**
+
+
+**Why?**
+
+
+**Any examples or references?**
+