feat: Add prop-types dependency, implement currency context, and enhance pricing display in components

- Added `prop-types` for better prop validation in components.
- Introduced `CurrencyProvider` to manage currency context and preload exchange rates.
- Updated pricing logic in various components to support new price structure and display currency.
- Refactored BOMSummary, MotorStep, and PowerSupplyStep to utilize new pricing methods and improve user experience.
- Enhanced export utilities to format prices correctly in markdown and Excel outputs.
- Updated hardware and component data structures to include detailed pricing information.

website/src/components/ui/ImageWithFallback.jsx

@@ -0,0 +1,40 @@
+import PropTypes from 'prop-types';
+
+/**
+ * Image component with error handling fallback
+ */
+export default function ImageWithFallback({ 
+  src, 
+  alt, 
+  className = '', 
+  containerClassName = '',
+  onError
+}) {
+  const handleError = (e) => {
+    e.target.style.display = 'none';
+    if (onError) {
+      onError(e);
+    }
+  };
+
+  if (!src) return null;
+
+  return (
+    <div className={containerClassName}>
+      <img
+        src={src}
+        alt={alt}
+        className={className}
+        onError={handleError}
+      />
+    </div>
+  );
+}
+
+ImageWithFallback.propTypes = {
+  src: PropTypes.string,
+  alt: PropTypes.string.isRequired,
+  className: PropTypes.string,
+  containerClassName: PropTypes.string,
+  onError: PropTypes.func,
+};