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.

.github/PULL_REQUEST_TEMPLATE.md

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+## Description
+
+<!-- What does this PR do? What problem does it solve? -->
+
+## Related issue
+
+<!-- Link the issue this PR closes, e.g. Closes #12 -->
+
+## Changes
+
+- [ ] Feature / fix implemented
+- [ ] `flutter test` passes
+- [ ] `flutter analyze` shows no new issues
+- [ ] Changelog updated (if user-facing change)
+
+## Screenshots (if applicable)
+
+<!-- Before/after or new UI -->

.github/workflows/build.yml

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+name: Build & Release
+
+on:
+  push:
+    branches: [main]
+    tags: ['v*']
+  workflow_dispatch:
+
+jobs:
+  build-linux:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Setup Flutter
+        uses: subosito/flutter-action@v2
+        with:
+          channel: stable
+
+      - name: Install packaging tools
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y patchelf fakeroot dpkg
+
+      - name: Get dependencies
+        run: flutter pub get
+
+      - name: Build Linux release
+        run: flutter build linux --release
+
+      - name: Build .deb package
+        run: bash dist/rebuild-deb.sh
+
+      - name: Upload .deb artifact
+        uses: actions/upload-artifact@v4
+        with:
+          name: imajviewer-linux
+          path: dist/imajviewer_*.deb
+
+  build-windows:
+    runs-on: windows-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Setup Flutter
+        uses: subosito/flutter-action@v2
+        with:
+          channel: stable
+
+      - name: Get dependencies
+        run: flutter pub get
+
+      - name: Build Windows release
+        run: flutter build windows --release
+
+      - name: Install Inno Setup
+        run: |
+          choco install innosetup --no-progress -y
+
+      - name: Sync version from pubspec.yaml
+        shell: pwsh
+        run: |
+          $version = (Select-String -Path pubspec.yaml -Pattern '^version:\s*([0-9]+\.[0-9]+\.[0-9]+)').Matches[0].Groups[1].Value
+          (Get-Content windows/installer.iss -Raw) -replace '#define MyAppVersion "[^"]+"', "#define MyAppVersion `"$version`"" | Set-Content windows/installer.iss
+          Write-Host "Inno Setup version: $version"
+
+      - name: Build Inno Setup installer
+        shell: cmd
+        run: |
+          "C:\ProgramData\chocolatey\bin\ISCC.exe" windows\installer.iss
+
+      - name: Upload installer artifact
+        uses: actions/upload-artifact@v4
+        with:
+          name: imajviewer-windows
+          path: |
+            build/windows/x64/runner/Release/
+            dist/imajviewer_setup_*.exe
+
+  create-release:
+    needs: [build-linux, build-windows]
+    runs-on: ubuntu-latest
+    if: startsWith(github.ref, 'refs/tags/v')
+    steps:
+      - name: Download Linux artifacts
+        uses: actions/download-artifact@v4
+        with:
+          name: imajviewer-linux
+          path: release-artifacts
+
+      - name: Download Windows artifacts
+        uses: actions/download-artifact@v4
+        with:
+          name: imajviewer-windows
+          path: release-artifacts/windows
+
+      - name: Create GitHub Release
+        uses: softprops/action-gh-release@v2
+        with:
+          name: "imajViewer ${{ github.ref_name }}"
+          body: |
+            imajViewer ${{ github.ref_name }}
+
+            See the [changelog](CHANGELOG.md) for details.
+
+            ### Downloads
+            - Linux: `.deb` package (Ubuntu/Debian)
+            - Windows: Inno Setup installer
+          files: |
+            release-artifacts/imajviewer_*.deb
+            release-artifacts/windows/dist/imajviewer_setup_*.exe
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}