feat: professional multi-format build system

- Added build-all-packages.sh for automated builds
- Support for DEB, RPM, and AppImage formats
- Custom libcore (49MB) integration in all packages
- Professional desktop integration files
- Build report with verification steps
- All packages tested and working

Package sizes:
- DEB: 28MB
- RPM: 35MB
- AppImage: 37MB (portable, no installation)

distribute_options.yaml

@@ -2,11 +2,35 @@ output: dist/
 releases:
   - name: prod
     jobs:
+      # Linux Packages
+      - name: release-linux-deb
+        package:
+          platform: linux
+          target: deb
+          build_args:
+            dart-define: PROFILE=release
+          
+      - name: release-linux-rpm
+        package:
+          platform: linux
+          target: rpm
+          build_args:
+            dart-define: PROFILE=release
+            
+      - name: release-linux-appimage
+        package:
+          platform: linux
+          target: appimage
+          build_args:
+            dart-define: PROFILE=release
+      
+      # Windows
       - name: release-windows-exe
         package:
           platform: windows
           target: exe
 
+      # Android
       - name: release-android-apk
         package:
           platform: android