feat: add filtered section templates for work/personal type distinction

Add thin-wrapper templates for work/personal filtering of CV sections:
- 8 new templates: cv-{experience,education,skills,interests}-{personal,work}.njk
- cv-languages.njk: standalone languages section (split from education)
- homepage-section.njk: 9 new routes for filtered variants
- cv.njk: uses work-only variants for the /cv/ page
- Base templates: filterType support in experience, education, skills, interests
- _data/cv.js: skillTypes and interestTypes fallback fields

_includes/components/sections/cv-skills.njk

@@ -11,6 +11,7 @@
 
   <div class="grid grid-cols-1 sm:grid-cols-2 gap-4">
     {% for category, items in cv.skills | dictsort %}
+    {% if not filterType or (cv.skillTypes and cv.skillTypes[category] == filterType) or (filterType == "personal" and (not cv.skillTypes or not cv.skillTypes[category])) %}
     <div class="p-4 bg-white dark:bg-surface-800 rounded-lg border border-surface-200 dark:border-surface-700">
       <h3 class="font-semibold text-sm uppercase tracking-wide text-surface-600 dark:text-surface-400 mb-2">
         {{ category }}
@@ -23,6 +24,7 @@
         {% endfor %}
       </div>
     </div>
+    {% endif %}
     {% endfor %}
   </div>
 </section>