build(packaging): set up multi-platform packaging and CI/CD

- Add GitHub Actions workflows for CI and releases
- Create icon generation script and SVG source
- Configure electron-builder for macOS, Windows, Linux
- Add macOS entitlements for code signing
- Add Linux post-install/remove scripts
- Enhance package.json with publishing scripts
- Add artifact naming convention

resources/icons/README.md

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+# ClawX Application Icons
+
+This directory contains the application icons for all supported platforms.
+
+## Required Files
+
+| File | Platform | Description |
+|------|----------|-------------|
+| `icon.svg` | Source | Vector source for all icons |
+| `icon.icns` | macOS | Apple Icon Image format |
+| `icon.ico` | Windows | Windows ICO format |
+| `icon.png` | All | 512x512 PNG fallback |
+| `16x16.png` - `512x512.png` | Linux | PNG set for Linux |
+
+## Generating Icons
+
+### Using the Script
+
+```bash
+# Make the script executable
+chmod +x scripts/generate-icons.sh
+
+# Run icon generation
+./scripts/generate-icons.sh
+```
+
+### Prerequisites
+
+**macOS:**
+```bash
+brew install imagemagick librsvg
+```
+
+**Linux:**
+```bash
+apt install imagemagick librsvg2-bin
+```
+
+**Windows:**
+Install ImageMagick from https://imagemagick.org/
+
+### Manual Generation
+
+If you prefer to generate icons manually:
+
+1. **macOS (.icns)**
+   - Create a `.iconset` folder with properly named PNGs
+   - Run: `iconutil -c icns -o icon.icns ClawX.iconset`
+
+2. **Windows (.ico)**
+   - Use ImageMagick: `convert icon_16.png icon_32.png icon_64.png icon_128.png icon_256.png icon.ico`
+
+3. **Linux (PNGs)**
+   - Generate PNGs at: 16, 32, 48, 64, 128, 256, 512 pixels
+
+## Design Guidelines
+
+- **Background**: Gradient from #6366f1 to #8b5cf6 (Indigo to Violet)
+- **Corner Radius**: ~20% of width (200px on 1024px canvas)
+- **Foreground**: White claw symbol with "X" accent
+- **Safe Area**: Keep 10% margin from edges
+
+## Updating the Icon
+
+1. Edit `icon.svg` with your vector editor (Figma, Illustrator, Inkscape)
+2. Run `./scripts/generate-icons.sh`
+3. Verify generated icons look correct
+4. Commit all generated files

resources/icons/icon.svg

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+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1024 1024">
+  <defs>
+    <linearGradient id="bgGrad" x1="0%" y1="0%" x2="100%" y2="100%">
+      <stop offset="0%" style="stop-color:#6366f1;stop-opacity:1" />
+      <stop offset="100%" style="stop-color:#8b5cf6;stop-opacity:1" />
+    </linearGradient>
+    <linearGradient id="clawGrad" x1="0%" y1="0%" x2="100%" y2="100%">
+      <stop offset="0%" style="stop-color:#ffffff;stop-opacity:1" />
+      <stop offset="100%" style="stop-color:#e0e7ff;stop-opacity:1" />
+    </linearGradient>
+  </defs>
+  
+  <!-- Background -->
+  <rect x="0" y="0" width="1024" height="1024" rx="200" fill="url(#bgGrad)"/>
+  
+  <!-- Claw shape -->
+  <g transform="translate(512, 512)" fill="url(#clawGrad)">
+    <!-- Center circle -->
+    <circle cx="0" cy="0" r="100"/>
+    
+    <!-- Claw fingers -->
+    <path d="M -50 -80 Q -80 -200 -150 -280 Q -180 -320 -150 -350 Q -120 -380 -80 -350 Q -20 -300 40 -150 Z" />
+    <path d="M 50 -80 Q 80 -200 150 -280 Q 180 -320 150 -350 Q 120 -380 80 -350 Q 20 -300 -40 -150 Z" />
+    <path d="M -100 20 Q -220 0 -320 -40 Q -370 -60 -390 -20 Q -410 20 -370 50 Q -300 100 -150 80 Z" />
+    <path d="M 100 20 Q 220 0 320 -40 Q 370 -60 390 -20 Q 410 20 370 50 Q 300 100 150 80 Z" />
+    <path d="M 0 120 Q 0 250 0 350 Q 0 400 40 420 Q 80 400 80 350 L 80 250 Q 60 150 0 120 Z" />
+    <path d="M 0 120 Q 0 250 0 350 Q 0 400 -40 420 Q -80 400 -80 350 L -80 250 Q -60 150 0 120 Z" />
+  </g>
+  
+  <!-- X mark -->
+  <g transform="translate(750, 750)" fill="#ffffff" opacity="0.9">
+    <rect x="-60" y="-15" width="120" height="30" rx="15" transform="rotate(45)"/>
+    <rect x="-60" y="-15" width="120" height="30" rx="15" transform="rotate(-45)"/>
+  </g>
+</svg>