feat(portfolio): redesign hero and projects sections with modern UI

- Implement new glassmorphism design for hero section with terminal mockup
- Redesign projects section with improved card layout and tech stack indicators
- Update project data with new entries and translations
- Add scroll-aware header with dynamic styling
- Remove unused ExperienceSection component

src/pages/index.astro

@@ -2,7 +2,6 @@
 import Layout from "@/layouts/Layout.astro";
 import GlassHeader from "@/components/GlassHeader";
 import HeroSection from "@/components/HeroSection";
-import ExperienceSection from "@/components/ExperienceSection";
 import SkillsSection from "@/components/SkillsSection";
 import ProjectsSection from "@/components/ProjectsSection";
 import Footer from "@/components/Footer";
@@ -18,7 +17,6 @@ const pageTitle = t('page.home.title');
   <GlassHeader lang={lang} client:only="react" />
   <main class="min-h-screen">
     <HeroSection lang={lang} client:only="react" />
-    <!-- <ExperienceSection lang={lang} client:only="react" /> -->
     <SkillsSection lang={lang} client:only="react" />
     <ProjectsSection lang={lang} client:only="react" />
   </main>