Add collapsible sections, restructure menu, and refine sidebar layouts

- Wrapped all CV sections and sidebar sections in <details> tags for collapsibility
- Added Expand All/Collapse All menu options with CV Sections submenu
- Implemented smooth CSS animations for section expansion/collapse using max-height transitions
- Fixed menu item alignment issues (removed extra padding)
- Added dash between company name and duration in experience section
- Moved SAP Technologies and AI-Assisted Development to bottom of right sidebar
- Reordered JavaScript Ecosystem above Go Ecosystem in left sidebar
- Implemented different layouts for left vs right sidebars:
  - Left sidebar: title left-aligned, triangle on right
  - Right sidebar: title right-aligned, triangle on left
- Adjusted sidebar spacing for better visual hierarchy when sections are open/closed

data/cv-en.json

@@ -212,7 +212,7 @@
     {
       "position": "Programmer Analyst (Freelance)",
       "company": "TwenTiC + ALTEN",
-      "companyURL": "https://www.twentic.com/kit-digital/",
+      "companyURL": "https://www.twentic.com/",
       "location": "Barcelona, Spain",
       "startDate": "2012-05",
       "endDate": "2012-10",
@@ -327,24 +327,16 @@
         ]
       },
       {
-        "category": "SAP Technologies",
+        "category": "JavaScript Ecosystem",
         "proficiency": 5,
+        "sidebar": "left",
         "items": [
-          "SAP Customer Data Cloud (CDC)",
-          "SAP Cloud Platform",
-          "SAP S/4HANA",
-          "GDPR Compliance & Data Protection"
-        ]
-      },
-      {
-        "category": "AI-Assisted Development",
-        "proficiency": 5,
-        "items": [
-          "AI Development Workflows (Claude Code, Copilot, GPT-4)",
-          "Agent-Based & Spec-Driven Development",
-          "Prompt Engineering & AI Integration",
-          "Automated Code Generation & Documentation",
-          "OpenAI & Anthropic APIs"
+          "Node.js & Express",
+          "React & React Ecosystem",
+          "Redux/Flux",
+          "Modern Build Tools (Webpack, Vite, ESBuild)",
+          "Package Management (npm, pnpm, bun)",
+          "Testing Frameworks (Jest, Playwright)"
         ]
       },
       {
@@ -361,19 +353,6 @@
           "Standard Library (net/http, html/template)"
         ]
       },
-      {
-        "category": "JavaScript Ecosystem",
-        "proficiency": 5,
-        "sidebar": "left",
-        "items": [
-          "Node.js & Express",
-          "React & React Ecosystem",
-          "Redux/Flux",
-          "Modern Build Tools (Webpack, Vite, ESBuild)",
-          "Package Management (npm, pnpm, bun)",
-          "Testing Frameworks (Jest, Playwright)"
-        ]
-      },
       {
         "category": "Frontend Technologies",
         "proficiency": 5,
@@ -476,6 +455,29 @@
           "Excalidraw",
           "GIMP"
         ]
+      },
+      {
+        "category": "SAP Technologies",
+        "proficiency": 5,
+        "sidebar": "right",
+        "items": [
+          "SAP Customer Data Cloud (CDC)",
+          "SAP Cloud Platform",
+          "SAP S/4HANA",
+          "GDPR Compliance & Data Protection"
+        ]
+      },
+      {
+        "category": "AI-Assisted Development",
+        "proficiency": 5,
+        "sidebar": "right",
+        "items": [
+          "AI Development Workflows (Claude Code, Copilot, GPT-4)",
+          "Agent-Based & Spec-Driven Development",
+          "Prompt Engineering & AI Integration",
+          "Automated Code Generation & Documentation",
+          "OpenAI & Anthropic APIs"
+        ]
       }
     ],
     "soft_skills": [