Optimization: Replace external image assets with local assets on Homepage

### **Problem**

The homepage (src/pages/home/_index.tsx) currently loads several icons in the "Technologies" section from external sources (Wikimedia, JsDelivr, Angular.io, etc.).

This causes several issues:

**Performance**: Multiple DNS lookups and SSL handshakes are required for the initial page load, slowing down the homepage.

**Reliability**: If any of the external CDNs (JsDelivr, Wikimedia) are down or slow, the images will fail to load.

**Privacy**: User IP addresses are leaked to these third-party services.

### **Proposed Solution**
Download all external assets referenced in TechnologiesGrid
Save them to static/assets/technologies/.
Update src/pages/home/_index.tsx to reference the local assets.