Add build system for native applications

- PyInstaller spec file for cross-platform builds
- Build scripts for Linux/macOS (build.sh) and Windows (build.bat)
- requirements.txt with all dependencies
- Updated README with build and installation instructions
- Support for creating standalone executables for all platforms

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

build.sh

@@ -0,0 +1,70 @@
+#!/bin/bash
+# Build script for Word Search application
+# This script builds the application for the current platform
+
+echo "========================================="
+echo "Word Search Application Builder"
+echo "========================================="
+echo ""
+
+# Check if PyInstaller is installed
+if ! command -v pyinstaller &> /dev/null; then
+    echo "PyInstaller not found. Installing dependencies..."
+    pip install -r requirements.txt
+fi
+
+# Clean previous builds
+echo "Cleaning previous builds..."
+rm -rf build dist
+
+# Detect platform
+if [[ "$OSTYPE" == "linux-gnu"* ]]; then
+    PLATFORM="Linux"
+    OUTPUT_NAME="WordSearch"
+elif [[ "$OSTYPE" == "darwin"* ]]; then
+    PLATFORM="macOS"
+    OUTPUT_NAME="WordSearch.app"
+elif [[ "$OSTYPE" == "msys" ]] || [[ "$OSTYPE" == "cygwin" ]] || [[ "$OSTYPE" == "win32" ]]; then
+    PLATFORM="Windows"
+    OUTPUT_NAME="WordSearch.exe"
+else
+    PLATFORM="Unknown"
+    OUTPUT_NAME="WordSearch"
+fi
+
+echo "Building for platform: $PLATFORM"
+echo ""
+
+# Build the application
+echo "Running PyInstaller..."
+pyinstaller word_search.spec
+
+# Check if build was successful
+if [ -d "dist" ]; then
+    echo ""
+    echo "========================================="
+    echo "Build completed successfully!"
+    echo "========================================="
+    echo ""
+    echo "Platform: $PLATFORM"
+    echo "Output location: dist/"
+
+    if [[ "$PLATFORM" == "macOS" ]]; then
+        echo "Application: dist/WordSearch.app"
+        echo ""
+        echo "To run: open dist/WordSearch.app"
+    elif [[ "$PLATFORM" == "Linux" ]]; then
+        echo "Executable: dist/WordSearch"
+        echo ""
+        echo "To run: ./dist/WordSearch"
+        chmod +x dist/WordSearch
+    else
+        echo "Executable: dist/WordSearch.exe"
+        echo ""
+        echo "To run: dist\\WordSearch.exe"
+    fi
+else
+    echo ""
+    echo "Build failed! Check the error messages above."
+    exit 1
+fi