docs: add documentation for creating and installing a custom module

mkdocs.yml

@@ -158,6 +158,7 @@ nav:
         - Assets manager: guides/assets-manager/README.md
         - Using NPM aliases: guides/assets-manager/NPM_ALIASING_GUIDE.md
         - Gulp pipeline: guides/gulp-pipeline/README.md
+        - Creating a Custom Module: guides/create-install-custom-module/README.md
   - Key Topics:
       - Manage your Content: topics/content-management/README.md
       - Content Relationships: topics/content-relationships/README.md

src/docs/guides/create-install-custom-module/README.md

@@ -0,0 +1,49 @@
+# Create and install a custom module
+
+## Creating a custom module
+Orchard Core offers a way to create a new CMS module. You can find a detailed guide in the official documentation: [Create a new CMS module](https://docs.orchardcore.net/en/latest/getting-started/templates/#create-a-new-cms-module). This guide assumes that a module already exists and focuses on how to install, customize, and enable it.
+## Module customization
+We can customize how your module appears in the Admin UI by editing the `Manifest.cs` file.
+
+The manifest file allows you to define the following attributes:
+- Name
+- Description
+- Author
+- Version
+- Category
+
+After modifying the `Manifest.cs` file, for the changes to take effect, follow these steps:
+1. Compile the solution
+2. Run the application
+3. If changes are not reflected, disable and re-enable the module
+
+## Installing the module
+To install a custom module in an Orchard Core CMS application, the module project must be referenced by the main CMS web project.
+
+For example, in Visual Studio:
+- Open the solution
+- Right-click on **Dependencies** in the project named `Orchard Core.Cms.Web`
+- Click on **Add Project Reference**
+- Select the custom module project
+- Click the Accept button
+
+After adding the reference, the main CMS project file should include an entry similar to:
+
+```
+<ItemGroup>
+<ProjectReference Include="..\MyModule.OrchardCore\MyModule.OrchardCore.csproj" />
+</ItemGroup>
+```
+This reference allows Orchard Core to discover and load the custom module at runtime.
+
+## Enabling the module
+Once the module is installed, it can be enabled from the administration panel:
+1. Go to the Admin dashboard
+2. Navigate to **Configuration > Features**
+3. Search using the name defined in the `Name` property of the manifest file
+4. Click the **Enable** button
+
+If the module does not appear in the list, check the following:    
+- The module must contain a manifest file (`Manifest.cs`)
+- The module project must be referenced by the CMS web project
+