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>

README.md

@@ -26,6 +26,17 @@ A Python GUI application for generating and playing interactive word search puzz
 
 ## Installation
 
+### Option 1: Download Pre-built Application (Recommended)
+
+Download the pre-built application for your platform from the releases page:
+- **Windows**: `WordSearch.exe`
+- **macOS**: `WordSearch.app`
+- **Linux**: `WordSearch` (executable)
+
+No installation required - just download and run!
+
+### Option 2: Run from Source
+
 1. Clone the repository:
 ```bash
 git clone https://git.firebugit.com/ksmith/WordSearch.git
@@ -34,12 +45,19 @@ cd WordSearch
 
 2. Install required dependencies:
 ```bash
-pip install reportlab
+pip install -r requirements.txt
 ```
 
 ## Usage
 
-Run the application:
+### Running the Application
+
+**From pre-built executable:**
+- **Windows**: Double-click `WordSearch.exe`
+- **macOS**: Double-click `WordSearch.app` or run `open WordSearch.app`
+- **Linux**: Run `./WordSearch` from terminal
+
+**From source:**
 ```bash
 python word_search_generator.py
 ```
@@ -86,6 +104,48 @@ python word_search_generator.py
 - ReportLab for PDF generation
 - Event-driven architecture for mouse interactions
 
+## Building from Source
+
+To create standalone executables for distribution:
+
+### Prerequisites
+
+Install build dependencies:
+```bash
+pip install -r requirements.txt
+```
+
+### Building
+
+**Linux/macOS:**
+```bash
+./build.sh
+```
+
+**Windows:**
+```cmd
+build.bat
+```
+
+The built application will be in the `dist/` directory:
+- **Linux**: `dist/WordSearch`
+- **macOS**: `dist/WordSearch.app`
+- **Windows**: `dist/WordSearch.exe`
+
+### Manual Build
+
+You can also build manually using PyInstaller:
+```bash
+pyinstaller word_search.spec
+```
+
+### Cross-Platform Notes
+
+- PyInstaller creates platform-specific executables
+- Build on the target platform (Windows build requires Windows, etc.)
+- macOS builds create an `.app` bundle
+- Linux/Windows builds create a single executable file
+
 ## License
 
 Created by Keith Smith