Improve styles and content consistency across multiple pages

Standardized H2 headings with a new `.h2-as-text` class for better alignment and styling. Adjusted footer and layout widths to 1200px for improved responsiveness. Updated the KI-Agents profiles, webinar section, and various style modules to ensure consistent formatting, better readability, and cleaner design.

docs/stylesheets/modules/home.scss

@@ -61,7 +61,7 @@
 
     h2{
       padding-bottom: 1rem;
-      max-width: 61rem;
+      max-width: 1200px;
       text-align: left;
       margin: 0 auto;
     }
@@ -69,7 +69,7 @@
     text-align: center;
     .satag--home-companies-logo-container{
       display: flex;
-      max-width: 61rem;
+      max-width: 1200px;
       margin: 0 auto;
       flex-wrap: wrap; // Erlaubt Umbruch bei kleinen Bildschirmen