docs: Revise iApp deployment and execution guides for clarity and structure

- Removed outdated deployment examples from the 'Build and Test' guide to streamline content.
- Enhanced the 'Deploy and Run' guide with a clearer introduction and restructured sections for better flow.
- Updated headings for consistency and improved readability throughout the documentation.

Author: Le-Caignec

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

@@ -205,38 +205,6 @@ The CLI will build a Docker image, run your app, and show you the results:
   :autoRestart="true"
 />
 
-## Deployment
-
-After your tests pass and the package is built, you can deploy your iApp to a
-supported network. During deployment, you'll enter your DockerHub credentials,
-specify your app version, and push both standard and TEE-compatible images:
-
-<template v-if="selectedChain === 42161">
-  <CLIDemo
-    initialCommand="iapp deploy --chain arbitrum-mainnet"
-    asciiText="Deploy"
-    :steps="arbitrumSteps"
-    :completionStep="15"
-    :completionMessage="'Deployment of your iApp completed successfully:'"
-    :completionItems="arbitrumCompletionItems"
-    :successMessage="'Run iapp run 0x1f80DCebc2EAAff0Db7156413C43B7e88D189923 to execute your iApp on an iExec TEE worker'"
-    :autoRestart="true"
-  />
-</template>
-
-<template v-else>
-  <CLIDemo
-    initialCommand="iapp deploy"
-    asciiText="Deploy"
-    :steps="bellecourSteps"
-    :completionStep="14"
-    :completionMessage="'Deployment of your iApp completed successfully:'"
-    :completionItems="bellecourCompletionItems"
-    :successMessage="'Run iapp run 0x1f80DCebc2EAAff0Db7156413C43B7e88D189923 to execute your iApp on an iExec TEE worker'"
-    :autoRestart="true"
-  />
-</template>
-
 ## Next Steps
 
 - When everything is ready

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

@@ -7,6 +7,10 @@ description:
 
 # Deploy and Run an iApp
 
+It's time to run your iApp! After building and testing, you'll need to deploy it to a supported network and then execute it.
+
+## Deploy your iApp
+
 After your tests pass and the package is built, you can deploy your iApp to a
 supported network. During deployment, you'll enter your DockerHub credentials,
 specify your app version, and push both standard and TEE-compatible images:
@@ -37,19 +41,14 @@ specify your app version, and push both standard and TEE-compatible images:
   />
 </template>
 
-# ⚡ Run an iApp
+## Run your iApp
 
 There are multiple ways to execute an iApp on the iExec network. An iApp can be:
 
 - **Self-sufficient** - Basic execution without additional inputs
 - **Data-dependent** - Requires protected data, secrets, input files, or
   command-line arguments
 
-This guide covers the basic execution methods. For advanced features like
-protected data, arguments, and input files, see the dedicated guides.
-
-## Using the iApp Generator Toolkit
-
 The iApp Generator CLI provides a streamlined way to execute iApp, especially
 for developers who have built their own iApp.