docs: add onboarding information step by step for each provider (#7362)

docs/tutorials/azure/getting-started-azure.md

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+# Getting Started with Azure on Prowler Cloud
+
+<iframe width="560" height="380" src="https://www.youtube-nocookie.com/embed/v1as8vTFlMg" title="Prowler Cloud Onboarding Azure" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowfullscreen="1"></iframe>
+
+Set up your Azure subscription to enable security scanning using Prowler Cloud.
+
+## Requirements
+
+To configure your Azure subscription, you’ll need:
+
+1. Get the `Subscription ID`
+2. Access to Prowler Cloud
+3. Configure authentication in Azure:
+
+    3.1 Create a Service Principal
+
+    3.2 Assign required permissions
+
+    3.3 Assign permissions at the subscription level
+
+4. Add the credentials to Prowler Cloud
+
+---
+
+## Step 1: Get the Subscription ID
+
+1. Go to the [Azure Portal](https://portal.azure.com/#home) and search for `Subscriptions`
+2. Locate and copy your Subscription ID
+
+    ![Search Subscription](./img/search-subscriptions.png)
+    ![Subscriptions Page](./img/get-subscription-id.png)
+
+---
+
+## Step 2: Access Prowler Cloud
+
+1. Go to [Prowler Cloud](https://cloud.prowler.com/)
+2. Navigate to `Configuration` > `Cloud Providers`
+
+    ![Cloud Providers Page](../img/cloud-providers-page.png)
+
+3. Click on `Add Cloud Provider`
+
+    ![Add a Cloud Provider](../img/add-cloud-provider.png)
+
+4. Select `Microsoft Azure`
+
+    ![Select Microsoft Azure](./img/select-azure-prowler-cloud.png)
+
+5. Add the Subscription ID and an optional alias, then click `Next`
+
+    ![Add Subscription ID](./img/add-subscription-id.png)
+
+---
+
+## Step 3: Configure the Azure Subscription
+
+### Create the Service Principal
+
+A Service Principal is required to grant Prowler the necessary privileges.
+
+1. Access **Microsoft Entra ID**
+
+    ![Search Microsoft Entra ID](./img/search-microsoft-entra-id.png)
+
+2. Navigate to `Manage` > `App registrations`
+
+    ![App Registration nav](./img/app-registration-menu.png)
+
+3. Click `+ New registration`, complete the form, and click `Register`
+
+    ![New Registration](./img/new-registration.png)
+
+4. Go to `Certificates & secrets` > `+ New client secret`
+
+    ![Certificate & Secrets nav](./img/certificates-and-secrets.png)
+    ![New Client Secret](./img/new-client-secret.png)
+
+5. Fill in the required fields and click `Add`, then copy the generated value
+
+| Value | Description |
+|-------|-------------|
+| Client ID | Application ID |
+| Client Secret | AZURE_CLIENT_SECRET |
+| Tenant ID | Azure Active Directory tenant ID |
+
+---
+
+### Assign Required API Permissions
+
+Assign the following Microsoft Graph permissions:
+
+    - Directory.Read.All
+
+    - Policy.Read.All
+
+    - UserAuthenticationMethod.Read.All (optional, for MFA checks)
+
+1. Go to your App Registration > `API permissions`
+
+    ![API Permission Page](./img/api-permissions-page.png)
+
+2. Click `+ Add a permission` > `Microsoft Graph` > `Application permissions`
+
+    ![Add API Permission](./img/add-api-permission.png)
+    ![Microsoft Graph Detail](./img/microsoft-graph-detail.png)
+
+3. Search and select:
+
+    - `Directory.Read.All`
+    - `Policy.Read.All`
+    - `UserAuthenticationMethod.Read.All`
+
+    ![Permission Screenshots](./img/directory-permission.png)
+
+4. Click `Add permissions`, then grant admin consent
+
+    ![Grant Admin Consent](./img/grant-admin-consent.png)
+
+---
+
+### Assign Permissions at the Subscription Level
+
+1. Download the [Prowler Azure Custom Role](https://github.com/prowler-cloud/prowler/blob/master/permissions/prowler-azure-custom-role.json)
+
+    ![Azure Custom Role](./img/download-prowler-role.png)
+
+2. Modify `assignableScopes` to match your Subscription ID (e.g. `/subscriptions/xxxx-xxxx-xxxx-xxxx`)
+
+3. Go to your Azure Subscription > `Access control (IAM)`
+
+    ![IAM Page](./img/iam-azure-page.png)
+
+4. Click `+ Add` > `Add custom role`, choose "Start from JSON" and upload the modified file
+
+    ![Add custom role via JSON](./img/add-custom-role-json.png)
+
+5. Click `Review + Create` to finish
+
+    ![Select review and create](./img/review-and-create.png)
+
+6. Return to `Access control (IAM)` > `+ Add` > `Add role assignment`
+
+    - Assign the `Reader` role
+    - Then repeat and assign the custom `ProwlerRole`
+
+    ![Role Assignment](./img/add-role-assigment.png)
+
+---
+
+## Step 4: Add Credentials to Prowler Cloud
+
+1. Go to your App Registration overview and copy the `Client ID` and `Tenant ID`
+
+    ![App Overview](./img/app-overview.png)
+
+2. Go to Prowler Cloud and paste:
+
+    - `Client ID`
+    - `Tenant ID`
+    - `AZURE_CLIENT_SECRET` from earlier
+
+    ![Prowler Cloud Azure Credentials](./img/add-credentials-azure-prowler-cloud.png)
+
+3. Click `Next`
+
+    ![Next Detail](./img/click-next-azure.png)
+
+4. Click `Launch Scan`
+
+    ![Launch Scan Azure](./img/launch-scan.png)