Update documentation links for improved navigation and consistency

- Adjusted links in the Hello World and Data Monetization guides to reflect the new directory structure.
- Ensured all references to tutorials and demos point to the correct paths for better user experience.

Author: Le-Caignec

src/get-started/helloWorld/3-buildIApp.md

@@ -59,14 +59,14 @@ Here are some popular use cases:
 Send privacy-preserving emails to registered Ethereum account holders without
 knowing or storing their email addresses.
 [Github](https://github.com/iExecBlockchainComputing/web3mail-sdk/tree/main/dapp)
-| [Documentation](../use-iapp/web3mail)
+| [Documentation](../../guides/use-iapp/web3mail)
 
 ### 💬 Web3 Telegram
 
 Send privacy-preserving Telegram messages without knowing or storing their
 Telegram handles.
 [Github](https://github.com/iExecBlockchainComputing/web3telegram-sdk/tree/main/dapp)
-| [Documentation](../use-iapp/web3telegram)
+| [Documentation](../../guides/use-iapp/web3telegram)
 
 ### 🌐 Content Delivery
 

src/guides/manage-data/handle-schemas-dataset-types.md

@@ -268,4 +268,4 @@ explore next:
   [processProtectedData](/references/dataProtector/dataProtectorCore/processProtectedData)
   for running computations
 - **See it in action**: Try our
-  [Hello World tutorial](/documentation/helloWorld) for a complete example
+  [Hello World tutorial](/get-started/helloWorld) for a complete example

src/guides/manage-data/monetize-protected-data.md

@@ -71,7 +71,7 @@ access time, not individual transactions.
 
 ::: tip See It Live
 
-The [Content Creator demo](/documentation/use-cases) shows DataProtector Sharing
+The [Content Creator demo](/get-started/use-cases) shows DataProtector Sharing
 in action with file monetization. While it uses the content-delivery iApp for
 file streaming, the same patterns work for any iApp - AI models, data
 processing, oracles, etc.
@@ -242,7 +242,7 @@ usage periods, and flexible pricing models.
 
 **Ready to start monetizing your data?** Here are your next steps:
 
-- **See it in action**: Try the [Content Creator demo](/documentation/use-cases)
+- **See it in action**: Try the [Content Creator demo](/get-started/use-cases)
   to understand the full flow
 - **Start simple**: Begin with
   [pay-per-use via grantAccess](/guides/manage-data/manage-access)