feat: add build script for cross-platform executables and update version to 0.3.0

.gitignore

@@ -1,3 +1,4 @@
 /target
 /binbreak_highscores.txt
 /.idea
+/executables

Cargo.lock

@@ -40,7 +40,7 @@ dependencies = [
 
 [[package]]
 name = "binbreak"
-version = "0.1.0"
+version = "0.3.0"
 dependencies = [
  "color-eyre",
  "crossterm 0.29.0",

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "binbreak"
-version = "0.1.0"
+version = "0.3.0"
 description = "A terminal based binary number guessing game"
 authors = ["William Raendchen <william@holonaut.io>"]
 license = "MIT"

build.sh

@@ -0,0 +1,46 @@
+#!/bin/bash
+
+# Build script for binbreak game
+# Builds for Linux and Windows, copies executables to executables/ directory
+
+set -e  # Exit on error
+
+echo "🔨 Building binbreak for multiple platforms..."
+echo ""
+
+# Create executables directory if it doesn't exist
+EXEC_DIR="executables"
+mkdir -p "$EXEC_DIR"
+
+# Get version from Cargo.toml
+VERSION=$(grep '^version' Cargo.toml | head -n1 | cut -d'"' -f2)
+
+# Build for Linux (native)
+echo "📦 Building for Linux (x86_64)..."
+cargo build --release
+LINUX_BIN="binbreak-v${VERSION}-linux-x86_64"
+cp "target/release/binbreak" "$EXEC_DIR/$LINUX_BIN"
+echo "✅ Linux build complete: $EXEC_DIR/$LINUX_BIN"
+echo ""
+
+# Build for Windows
+echo "📦 Building for Windows (x86_64)..."
+if ! rustup target list | grep -q "x86_64-pc-windows-gnu (installed)"; then
+    echo "⚠️  Installing Windows target (x86_64-pc-windows-gnu)..."
+    rustup target add x86_64-pc-windows-gnu
+fi
+
+cargo build --release --target x86_64-pc-windows-gnu
+WINDOWS_BIN="binbreak-v${VERSION}-windows-x86_64.exe"
+cp "target/x86_64-pc-windows-gnu/release/binbreak.exe" "$EXEC_DIR/$WINDOWS_BIN"
+echo "✅ Windows build complete: $EXEC_DIR/$WINDOWS_BIN"
+echo ""
+
+# Print summary
+echo "🎉 All builds complete!"
+echo ""
+echo "Executables:"
+ls -lh "$EXEC_DIR" | tail -n +2
+echo ""
+echo "Location: $EXEC_DIR/"
+