Add main components and web applications documentation for Single Layer Solution Template

docs/en/solution-templates/single-layer-web-application/main-components.md

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+# Single Layer Solution: Main Components
+
+````json
+//[doc-nav]
+{
+  "Previous": {
+    "Name": "Solution structure",
+    "Path": "solution-templates/single-layer-web-application/solution-structure"
+  },
+  "Next": {
+    "Name": "Web Applications",
+    "Path": "solution-templates/single-layer-web-application/web-applications"
+  }
+}
+````
+
+The single-layer solution template is a single project containing all the essential components for building a monolithic application. It supports the `--migrate-database` command-line argument to create the database and seed initial data. The main components of the solution are:
+
+* [Web Applications](web-applications.md)
+* [Db Migrator](db-migrator.md)

docs/en/solution-templates/single-layer-web-application/web-applications.md

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+# Single Layer Solution: Web Applications
+
+````json
+//[doc-nav]
+{
+  "Previous": {
+    "Name": "Main Components",
+    "Path": "solution-templates/single-layer-web-application/main-components"
+  },
+  "Next": {
+    "Name": "Db Migrator",
+    "Path": "solution-templates/single-layer-web-application/db-migrator"
+  }
+}
+````
+
+The single-layer solution template includes a web application project that acts as the main application. This ASP.NET Core application hosts the API endpoints and may also serve the user interface, depending on the selected UI framework.  
+
+- **MVC / Razor Pages**: This is an ASP.NET Core MVC application. It is a traditional web application that serves HTML pages to users and is suitable for building web applications with server-side rendering.  
+- **Angular**: This is an Angular application, a single-page application (SPA) that runs on the client side. It communicates with the server using HTTP requests and is ideal for building modern web applications with rich user interfaces.  
+- **Blazor UI**: A flexible framework for building web applications with .NET. It supports various hosting models:
+  - **Blazor WebAssembly**: This is a client-side SPA that runs entirely in the user's browser. It communicates with the server using HTTP requests and is suitable for modern web applications with rich interactivity and offline capabilities.  
+  - **Blazor Server**: This is a server-side SPA that runs on the server and communicates with the client in real time using SignalR. It is ideal for applications requiring constant connectivity and rapid server updates.   
+- **No UI**: This option creates a backend-only solution without a web interface, suitable for scenarios like API-only applications or headless services. 
+
+You can select the web application type that fits your requirements during the solution creation process in the *UI Framework* step. The single-layer solution template generates the selected web applications with the necessary configurations and integrations.
+
+![Web Applications](images/web-applications.png)
+
+## MVC / Razor Pages
+
+MVC (Model-View-Controller) is a design pattern commonly used for building web applications. Razor Pages, on the other hand, is a page-based programming model designed to make building web applications simpler and more productive.  
+
+When you select the MVC / Razor Pages option in the single-layer solution template, it generates an ASP.NET Core MVC application named something like `Acme.BookStore`. This application serves as the web interface for your solution, using server-side rendering to deliver dynamic HTML pages to users.
+
+## Angular
+
+Angular is a popular front-end framework for building single-page applications (SPAs). It offers a rich set of features for creating modern web applications with dynamic and interactive user interfaces.
+
+When you select the Angular option in the single-layer solution template, it generates:  
+- An Angular application located under the solution's root folder, typically named `angular`.  
+- An ASP.NET Core application, usually named something like `Acme.Bookstore`.
+
+The Angular application runs as a client-side SPA in the user's browser and communicates with the server by sending HTTP requests to the ASP.NET Core host application.
+
+## Blazor UI
+
+Blazor is a flexible framework for building web applications with .NET. It supports various hosting models, including Blazor WebAssembly, Blazor Server, Blazor WebApp, and Maui Blazor (Hybrid).
+
+### Blazor WebAssembly
+
+Blazor WebAssembly is a client-side SPA that runs entirely in the user's browser. It communicates with the server using HTTP requests and is suitable for modern web applications with rich interactivity and offline capabilities.
+
+When you select the Blazor WebAssembly option in the Layered Solution Template, it generates:  
+- A Blazor application located under the solution's root folder, typically named `*.Blazor`, which serves as the main Blazor host project.
+- A Blazor client application, named `*.Blazor.Client`, where you can write the client-side (UI logic) code.  
+- An ASP.NET Core application, named `*.HttpApi.Host`, where the server-side (business logic) code runs.  
+
+The Blazor client application communicates with the server by sending HTTP requests to the `*.HttpApi.Host` application.
+
+### Blazor Server
+
+Blazor Server is a server-side SPA that runs on the server and communicates with the client in real time using SignalR. It is ideal for applications requiring constant connectivity and rapid server updates.
+
+When you select the Blazor Server option in the Layered Solution Template, it generates:  
+- A Blazor application located under the solution's root folder, typically named `*.Blazor`, which serves as the main Blazor host project.  
+
+## No UI
+
+This option creates a backend-only solution without a web interface, suitable for scenarios like API-only applications or headless services.  
+
+When you select the No UI option in the Layered Solution Template, it generates an ASP.NET Core application named `*.HttpApi.Host` that serves as the backend API for your solution.