feat(workshops): implement static workshop listing page (#188)

- Fixed broken Jinja2 template rendering (was showing raw code)
- Created custom workshops.html template with workshop data
- Simplified navigation title from full SEO title to 'Workshops'
- Added workshop post files for future blog integration
- Configured blog plugin for workshops (currently unused)
- Removed broken Jinja2 macro implementation

Changes:
- docs/workshops/index.md: Clean title, template directive
- mkdocs.yml: Blog plugin workshop configuration
- overrides/workshops.html: Static workshop template with FontAwesome icons
- docs/workshops/posts/: Individual workshop markdown files
- docs/templates/workshop-update-guide.md: Update documentation

Result: Clean, professional workshop page with proper VHS link handling
(upcoming workshops have links, past workshops don't)

overrides/workshops.html

@@ -0,0 +1,69 @@
+{% extends "main.html" %}
+
+{% block content %}
+  {{ super() }}
+
+  {# Simple approach: Create workshop data directly from frontmatter structure #}
+  {# Workshop data will be rendered manually with correct structure #}
+  
+  <h2>Die Nächsten Seminar-Termine</h2>
+  
+  <div class="satag--webinar-dates">
+    <div class="satag--webinar-item">
+      <div class="satag--webinar-date">
+        <i class="fa-sharp fa-thin fa-calendar-day"></i> Sa., 29.11.2025
+      </div>
+      <div class="satag--webinar-time">
+        <i class="fa-sharp fa-thin fa-clock"></i> 09:00 – 13:00 Uhr
+      </div>
+      <div class="satag--webinar-course">
+        <i class="fa-sharp fa-thin fa-arrow-up-right-from-square"></i> 
+        <a href="https://www.vhs-worms.de/programm/kurs/KI-Chatbots-im-Privatleben-nutzen/Z04.052" target="_blank" title="KI-Chatbots im Privatleben nutzen">
+          Z04.052 KI-Chatbots im Privatleben nutzen
+        </a>
+      </div>
+      <div class="satag--webinar-location">
+        <i class="fa-sharp fa-thin fa-location-dot"></i> vhs, Willy-Brandt-Ring 11, Raum 1.09, 67547 Worms
+      </div>
+    </div>
+  </div>
+
+  <hr>
+  
+  <h2>Vergangene Workshops</h2>
+  
+  <div class="satag--webinar-dates satag--webinar-dates--past">
+    <div class="satag--webinar-item">
+      <div class="satag--webinar-date">
+        <i class="fa-sharp fa-thin fa-calendar-day"></i> Sa., 12.07.2025
+      </div>
+      <div class="satag--webinar-time">
+        <i class="fa-sharp fa-thin fa-clock"></i> 09:00 – 13:00 Uhr
+      </div>
+      <div class="satag--webinar-course">
+        <i class="fa-sharp fa-thin fa-graduation-cap"></i> 
+        Y01.945 KI-Einsatz im Beruf – Nutzen von KI-Chatbots im Arbeitsalltag
+      </div>
+      <div class="satag--webinar-location">
+        <i class="fa-sharp fa-thin fa-location-dot"></i> vhs, Willy-Brandt-Ring 11, Raum 1.09, 67547 Worms
+      </div>
+    </div>
+
+    <div class="satag--webinar-item">
+      <div class="satag--webinar-date">
+        <i class="fa-sharp fa-thin fa-calendar-day"></i> Sa., 21.06.2025
+      </div>
+      <div class="satag--webinar-time">
+        <i class="fa-sharp fa-thin fa-clock"></i> 09:00 – 13:00 Uhr
+      </div>
+      <div class="satag--webinar-course">
+        <i class="fa-sharp fa-thin fa-graduation-cap"></i> 
+        Y01.944 KI-Chatbots im Privatleben nutzen
+      </div>
+      <div class="satag--webinar-location">
+        <i class="fa-sharp fa-thin fa-location-dot"></i> vhs, Willy-Brandt-Ring 11, Raum 1.09, 67547 Worms
+      </div>
+    </div>
+  </div>
+
+{% endblock %}