Add new SVG assets and update favicon

- Created new SVG file for Story Book (301702_Story-Book_R_neg.svg) with detailed design elements.
- Added Remote Work SVG asset (306031_Remote_Work_R.svg) with color and style definitions.
- Introduced negative version of Remote Work SVG (306031_Remote_Work_R_neg.svg) for alternative usage.
- Added a new PNG asset (asset.png) to the public directory.
- Updated favicon.ico with new design.

Author: jung-thomas

docs/index.md

@@ -6,7 +6,7 @@ hero:
   text: "CodeJam"
   tagline: Build full-stack SAP applications from zero to deployed in 8 hands-on exercises
   image:
-    src: /logo.svg
+    src: /asset.png
     alt: SAP
   actions:
     - theme: brand
@@ -17,22 +17,34 @@ hero:
       link: /prerequisites/
 
 features:
-  - icon: 🎓
+  - icon:
+      light: /300919_Agreement_R.svg
+      dark: /300919_Agreement_R_neg.svg
+      alt: Agreement
     title: Attending an event?
     details: Follow along with your instructor. Start with the Prerequisites to get your environment ready before the session.
     link: /prerequisites/
     linkText: Go to Prerequisites
-  - icon: 📖
+  - icon:
+      light: /301702_Story-Book_R.svg
+      dark: /301702_Story-Book_R_neg.svg
+      alt: Story Book
     title: Self-studying?
     details: Work through all 8 exercises at your own pace — from HANA Cloud setup through MTA deployment.
     link: /exercises/ex1/
     linkText: Start Exercise 1
-  - icon: 🧑‍🏫
+  - icon:
+      light: /306031_Remote_Work_R.svg
+      dark: /306031_Remote_Work_R_neg.svg
+      alt: Remote Work
     title: Running an event?
     details: Set up participant accounts, provision HANA Cloud, and manage SAP BTP resources for your group.
     link: /instructor/
     linkText: Instructor Setup
-  - icon: 🤖
+  - icon:
+      light: /301559_Diamond_R.svg
+      dark: /301559_Diamond_R_neg.svg
+      alt: Diamond
     title: Using AI assistance?
     details: Connect MCP servers, configure AI agents, and use Claude Code or GitHub Copilot with this repository.
     link: /ai-agents/