build: github acik kaynak hazirligi — LICENSE/CI/topluluk dosyalari eklendi, binary'ler takipten cikarildi, README EN, kok dokumanlar docs/'a tasindi

.github/ISSUE_TEMPLATE/bug_report.md

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+---
+name: Bug report
+about: Report a bug to help us improve
+title: "[Bug] "
+labels: bug
+assignees: ''
+---
+
+**Describe the bug**
+A clear and concise description of what the bug is.
+
+**To reproduce**
+Steps to reproduce the behavior:
+1. Open '...'
+2. Click on '...'
+3. See error
+
+**Expected behavior**
+What you expected to happen.
+
+**Screenshots / screen recording**
+If applicable, add screenshots to help explain your problem.
+
+**Environment**
+- OS / distro: [e.g. Ubuntu 24.04, Windows 11]
+- imajViewer version: [e.g. 1.1.0 — from `pubspec.yaml` or release name]
+- Desktop environment / GPU: [e.g. XFCE + llvmpipe, or NVIDIA driver]
+
+**Additional context**
+Anything else relevant (log output, image that triggers the bug, etc.)

.github/ISSUE_TEMPLATE/feature_request.md

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+---
+name: Feature request
+about: Suggest an idea for imajViewer
+title: "[Feature] "
+labels: enhancement
+assignees: ''
+---
+
+**Is your feature request related to a problem?**
+A clear and concise description of what the problem is. Ex. I'm always frustrated when [...]
+
+**Describe the solution you'd like**
+A clear and concise description of what you want to happen.
+
+**Describe alternatives you've considered**
+Other approaches or workarounds you've tried.
+
+**Additional context**
+Screenshots, mockups, or any other context about the feature request.