feat: redesign page heroes, implement organic markers, and streamline contact flow

- Refined hero sections for About, Blog, Websites, and Case Studies for a bespoke industrial entry point.
- Redesigned Marker component using layered SVG paths for an organic, hand-drawn highlighter effect.
- Restored technical precision in ArchitectureVisualizer with refined line thickness.
- Streamlined contact page by removing generic headers and prioritizing the configurator/gateway.
- Updated technical references to reflect self-hosted Gitea infrastructure.
- Cleaned up unused imports and addressed linting warnings across modified pages.

apps/web/src/components/ContactForm/steps/TimelineStep.tsx

@@ -30,7 +30,7 @@ export function TimelineStep({ state, updateState }: TimelineStepProps) {
     <div className="space-y-12">
       <div className="space-y-6">
         <div className="flex justify-between items-center">
-          <h4 className="text-2xl font-bold text-slate-900">Zeitplan</h4>
+          <h4 className="text-lg font-bold text-slate-900">Zeitplan</h4>
           <button
             type="button"
             onClick={() => toggleDontKnow("timeline")}
@@ -91,7 +91,7 @@ export function TimelineStep({ state, updateState }: TimelineStepProps) {
         </div>
       </div>
       {state.deadline === "asap" && (
-        <div className="p-8 bg-slate-50 rounded-[2rem] border border-slate-100 flex gap-6 items-start">
+        <div className="p-8 bg-slate-50 rounded-xl border border-slate-100 flex gap-6 items-start">
           <AlertCircle className="text-slate-900 shrink-0 mt-1" size={28} />
           <p className="text-base text-slate-600 leading-relaxed">
             <strong>Hinweis:</strong> Bei sehr kurzfristigen Deadlines kann ein
@@ -102,9 +102,9 @@ export function TimelineStep({ state, updateState }: TimelineStepProps) {
       )}
 
       {(isMissingAssets || isMissingPages) && (
-        <div className="p-8 bg-amber-50 rounded-[2rem] border border-amber-100 flex gap-6 items-start">
+        <div className="p-8 bg-amber-50 rounded-xl border border-amber-100 flex gap-6 items-start">
           <div className="w-12 h-12 bg-white rounded-xl flex items-center justify-center text-amber-600 shrink-0">
-            <AlertCircle size={24} />
+            <AlertCircle size={16} />
           </div>
           <div className="space-y-2">
             <p className="text-amber-900 text-xl font-bold">