feat: add bilingual support to info modal

- Added 'ui' section to cv-en.json and cv-es.json with modal translations
- Updated Go models to include UI, InfoModal, and TechStack structs
- Modified template to use JSON data instead of inline if/else statements
- Used template.HTML for Description field to allow HTML rendering
- Modal now fully supports English and Spanish translations

Translations include:
- Modal title
- Description text
- Tech stack labels (HTML5 Semántico vs Semantic HTML5, etc.)
- View source button text

data/cv-en.json

@@ -911,6 +911,19 @@
   "other": {
     "driverLicense": "<strong>Type B</strong>"
   },
+  "ui": {
+    "infoModal": {
+      "title": "About this CV",
+      "description": "This interactive CV was built by myself with <strong>Go + HTMX</strong>, showcasing modern hypermedia architecture without heavy JavaScript frameworks.",
+      "techStack": {
+        "goHono": "Go + Hono",
+        "htmx": "HTMX",
+        "html5": "Semantic HTML5",
+        "css3": "Pure CSS3"
+      },
+      "viewSource": "View Source Code"
+    }
+  },
   "meta": {
     "version": "2025-11-09",
     "lastUpdated": "2025-11-08",