refactor: update header badge and remove Tailwind CSS

- Change JAVA DEVELOPER to GO DEVELOPER in header badge
- Remove Tailwind CSS from AI & Modern Development skills (both EN/ES)
- Align tech stack with actual project technologies

data/cv-es.json

@@ -328,7 +328,6 @@
           "Desarrollo Asistido por IA (Claude Code, Copilot, GPT-4)",
           "Ingeniería de Prompts y Flujos de Trabajo con IA",
           "HTMX (Aplicaciones Hipermedia)",
-          "Tailwind CSS",
           "Go (Golang)",
           "APIs OpenAI y Anthropic"
         ]