docs: Update iApp guides for improved clarity and consistency

Author: Le-Caignec

src/guides/build-iapp/build-&-test.md

@@ -1,7 +1,7 @@
 ---
-title: Create and Deploy an iApp
+title: Build and Test an iApp
 description:
-  How to create a confidential iExec application and deploy it on iExec protocol
+  Learn how to build, test, and package your iExec application using the iApp Generator CLI tool
 ---
 
 # Build and Test an iApp

src/guides/build-iapp/deploy-&-run.md

@@ -1,8 +1,7 @@
 ---
-title: Run an iApp
+title: Deploy and Run an iApp
 description:
-  Learn about various methods for executing iApp on the iExec network, including
-  CLI and SDK approaches
+  Deploy your iApp to supported networks and learn how to execute it using the iApp Generator CLI
 ---
 
 # Deploy and Run an iApp

src/guides/build-iapp/manage-access.md

@@ -118,13 +118,13 @@ iexec wallet import <private-key>
 
 ::: tip iApp Generator Users
 
-If you used iApp Generator, you already have an `iexecconfig.json` file with a
+If you used iApp Generator, you already have an `iapp.config.json` file with a
 generated private key. You can use this existing private key to initialize your
 wallet:
 
 ```bash
-# Extract the private key from your `iexecconfig.json`
-iexec wallet import <your-private-key-from-iexecconfig>
+# Extract the private key from your `iapp.config.json`
+iexec wallet import <your-private-key>
 ```
 
 :::