feature: update feature icons and add new SVG files for improved visuals

Author: ErwanDecoster

src/index.md

@@ -19,36 +19,35 @@ hero:
       link: /get-started/helloWorld
 
 features:
-  - icon: <img src="/icon_build_app.svg" />
-    src:
+  - icon: <img src="/icon_quick_start.svg" />
     title: Quick Start
     details: Jump in and start building on iExec in minutes.
     link: /get-started/helloWorld
-  - icon: 🔐
+  - icon: <img src="/icon_protect_and_manage data.svg" />
     title: Protect & Manage Data
     details:
       DataProtector encrypts and allows you to control access to your sensitive
       data. Ready-to-use privacy toolkit for developers.
     link: /guides/manage-data/manage-access
-  - icon: 🤖
+  - icon: <img src="/icon_build_app.svg" />
     title: Build iApp
     details:
       iApp Generator builds confidential applications that run in secure TEEs.
       Custom confidentiality integration without managing infrastructure.
     link: /guides/build-iapp/build-&-test
-  - icon: ⚡
+  - icon: <img src="/icon_use_iapps.svg" />
     title: Use iApp
     details:
       Execute privacy-preserving apps like Web3Mail and Web3Telegram. Use what
       others built, extend what you need.
     link: /guides/use-iapp/introduction
-  - icon: 💰
+  - icon: <img src="/icon_monetize_data.svg" />
     title: Monetize Data
     details:
       Create revenue streams from your data while maintaining full control and
       privacy
     link: /guides/use-iapp/how-to-pay-executions
-  - icon: 🧠
+  - icon: <img src="/icon_protocol.svg" />
     title: Protocols
     details:
       Deep dive into core protocol concepts. Understand how iExec enables