Add complete Government Travel Cost Estimator web application

Co-authored-by: mblanke <9078342+mblanke@users.noreply.github.com>

config.js

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+// Configuration file for Amadeus API
+// To enable real-time flight search, add your Amadeus API credentials here
+
+// Instructions to get Amadeus API credentials:
+// 1. Visit https://developers.amadeus.com/
+// 2. Sign up for a free account
+// 3. Create a new app in your dashboard
+// 4. Copy your API Key and API Secret
+// 5. Paste them below
+
+const CONFIG = {
+    amadeus: {
+        // Replace these with your actual Amadeus API credentials
+        apiKey: null,  // Your Amadeus API Key
+        apiSecret: null,  // Your Amadeus API Secret
+        environment: 'test'  // 'test' or 'production'
+    }
+};
+
+// Initialize Amadeus API if credentials are provided
+if (CONFIG.amadeus.apiKey && CONFIG.amadeus.apiSecret) {
+    if (typeof configureAmadeusAPI === 'function') {
+        configureAmadeusAPI(CONFIG.amadeus.apiKey, CONFIG.amadeus.apiSecret);
+        console.log('Amadeus API configured successfully');
+    }
+} else {
+    console.log('Amadeus API not configured - using mock flight data');
+}
+
+// Export configuration
+if (typeof module !== 'undefined' && module.exports) {
+    module.exports = CONFIG;
+}