fix: adding paste shortcut tip to the start of each tutorial (dotnet#31751)

* fix: adding `paste` shortcut tip to the start of each tutorial

* chore: using `alert syntax` and `<kbd>`

Co-authored-by: David Pine <[email protected]>

* chore: using `alert syntax` and `<kbd>`

Co-authored-by: David Pine <[email protected]>

* chore: using `alert syntax` and `<kbd>`

Co-authored-by: David Pine <[email protected]>

* chore: using `alert syntax` and `<kbd>`

Co-authored-by: David Pine <[email protected]>

* chore: using `alert syntax` and `<kbd>`

Co-authored-by: David Pine <[email protected]>

* chore: using `alert syntax` and `<kbd>`

Co-authored-by: David Pine <[email protected]>

* Update docs/csharp/tour-of-csharp/tutorials/list-collection.yml

Co-authored-by: David Pine <[email protected]>

Author: luizhlelis

docs/csharp/tour-of-csharp/tutorials/branches-and-loops-local.md

@@ -8,6 +8,9 @@ ms.date: 03/23/2022
 
 This tutorial teaches you how to write C# code that examines variables and changes the execution path based on those variables. You write C# code and see the results of compiling and running it. The tutorial contains a series of lessons that explore branching and looping constructs in C#. These lessons teach you the fundamentals of the C# language.
 
+> [!TIP]
+> To paste a code snippet inside the **focus mode** you should use your keyboard shortcut (<kbd>Ctrl</kbd> + <kbd>v</kbd>, or <kbd>cmd</kbd> + <kbd>v</kbd>).
+
 ## Prerequisites
 
 The tutorial expects that you have a machine set up for local development. See [Set up your local environment](local-environment.md) for installation instructions and an overview of application development in .NET.

docs/csharp/tour-of-csharp/tutorials/branches-and-loops.yml

@@ -16,6 +16,9 @@ items:
 - durationInMinutes: 1
   content: |
     This tutorial teaches you how to write code that examines variables and changes execution path based on those variables. You'll use your browser to write C# interactively and see the results of compiling and running your code. This tutorial contains a series of lessons that explore branching and looping constructs in C#. These lessons teach you the fundamentals of the C# language.
+
+    > [!TIP]
+    > To paste a code snippet inside the **focus mode** you should use your keyboard shortcut (<kbd>Ctrl</kbd> + <kbd>v</kbd>, or <kbd>cmd</kbd> + <kbd>v</kbd>).
 - title: Make decisions using the if statement
   durationInMinutes: 4
   content: |

docs/csharp/tour-of-csharp/tutorials/hello-world.yml

@@ -16,6 +16,9 @@ items:
 - durationInMinutes: 1
   content: |
     This tutorial teaches you C# interactively, using your browser to write C# and see the results of compiling and running your code. It contains a series of lessons that begin with a "Hello World" program. These lessons teach you the fundamentals of the C# language.
+    
+    > [!TIP]
+    > To paste a code snippet inside the **focus mode** you should use your keyboard shortcut (<kbd>Ctrl</kbd> + <kbd>v</kbd>, or <kbd>cmd</kbd> + <kbd>v</kbd>).
 - title: Run your first C# program
   durationInMinutes: 2
   content: |

docs/csharp/tour-of-csharp/tutorials/list-collection.yml

@@ -14,6 +14,9 @@ items:
 - durationInMinutes: 1
   content: |
     This tutorial teaches you C# interactively, using your browser to write C# code and see the results of compiling and running your code. It contains a series of lessons that create, modify, and explore collections and arrays.
+    
+    > [!TIP]
+    > To paste a code snippet inside the **focus mode** you should use your keyboard shortcut (<kbd>Ctrl</kbd> + <kbd>v</kbd>, or <kbd>cmd</kbd> + <kbd>v</kbd>).
 - title: Create lists
   durationInMinutes: 2
   content: |

docs/csharp/tour-of-csharp/tutorials/numbers-in-csharp-local.md

@@ -8,6 +8,9 @@ ms.date: 03/23/2022
 
 This tutorial teaches you about the numeric types in C#. You'll write small amounts of code, then you'll compile and run that code. The tutorial contains a series of lessons that explore numbers and math operations in C#. These lessons teach you the fundamentals of the C# language.
 
+> [!TIP]
+> To paste a code snippet inside the **focus mode** you should use your keyboard shortcut (<kbd>Ctrl</kbd> + <kbd>v</kbd>, or <kbd>cmd</kbd> + <kbd>v</kbd>).
+
 ## Prerequisites
 
 The tutorial expects that you have a machine set up for local development. See [Set up your local environment](local-environment.md) for installation instructions and an overview of application development in .NET.

docs/csharp/tour-of-csharp/tutorials/numbers-in-csharp.yml

@@ -16,6 +16,9 @@ items:
 - durationInMinutes: 1
   content: |
     This tutorial teaches you about the numeric types in C# interactively, using your browser. You'll write C# and see the results of compiling and running your code. It contains a series of lessons that explore numbers and math operations in C#. These lessons teach you the fundamentals of the C# language.
+    
+    > [!TIP]
+    > To paste a code snippet inside the **focus mode** you should use your keyboard shortcut (<kbd>Ctrl</kbd> + <kbd>v</kbd>, or <kbd>cmd</kbd> + <kbd>v</kbd>).
 - title: Explore integer math
   durationInMinutes: 4
   content: |