feat: add Projects section between Courses and Awards

Added new Projects section with two initial projects:
- Somos Una Ola - Beach cleaning initiative website (Node.js/Express/HTMX)
- Herrumbre Vivo Arte - Artist portfolio for recycled art

Changes:
- Added projects data to cv-en.json and cv-es.json
- Updated Project struct in models/cv.go with all required fields
- Added Projects section CSS matching Awards/Courses styling (80×80px icons)
- Added Projects template with icons, current badges, and Domestika link
- Reordered sections: Courses → Projects → Awards (as requested)

Features:
- Clickable project titles linking to websites
- Current badge for ongoing projects
- Period and location display
- Short descriptions (always visible)
- Responsibilities list (long version only)
- Technologies list (long version only)
- Footer with link to Domestika portfolio

data/cv-en.json

@@ -702,6 +702,36 @@
       ]
     }
   ],
+  "projects": [
+    {
+      "title": "Somos Una Ola - Beach Cleaning Initiative",
+      "url": "https://somosunaola.org",
+      "location": "La Palma, Canary Islands",
+      "startDate": "2023-07",
+      "current": true,
+      "technologies": ["Node.js", "Express.js", "HTMX"],
+      "shortDescription": "Volunteer project promoting beach cleaning on La Palma island. Created their website to publish completed cleanings and schedule future events.",
+      "responsibilities": [
+        "Designed and developed full-stack website using Node.js Express and HTMX",
+        "Implemented event publishing system for completed and upcoming beach cleanings",
+        "Supported environmental initiative that has completed 18 cleanings across 12 beaches"
+      ]
+    },
+    {
+      "title": "Herrumbre Vivo Arte - Artist Portfolio Website",
+      "url": "https://herrumbrevivoarte.com",
+      "location": "Fuencaliente, La Palma",
+      "startDate": "2024",
+      "current": true,
+      "technologies": ["Web Development", "Portfolio Design"],
+      "shortDescription": "Portfolio website for Gustavo Díaz, artisan who transforms recycled materials into sculptures. Promotes environmental art and sustainable creativity.",
+      "responsibilities": [
+        "Created online presence for recycled art project focused on sustainability",
+        "Showcased sculptures made from metal, plastic, glass, and wood waste",
+        "Highlighted environmental workshops and educational mission aligned with Sustainable Development Goals"
+      ]
+    }
+  ],
   "references": [
     {
       "title": "Recommendations Letter from TwenTIC",