Adding powershell instructions (#262)

1-getting-started/lessons/1-introduction-to-iot/virtual-device.md

@@ -55,18 +55,27 @@ Configure a Python virtual environment and install the pip packages for CounterF
 
 1. Activate the virtual environment:
 
-    * On Windows run:
+    * On Windows:
+        * If you are using the Command Prompt, or the Command Prompt through Windows Terminal, run:
 
             ```cmd
             .venv\Scripts\activate.bat
             ```
 
+        * If you are using PowerShell, run:
+
+            ```powershell
+            .\.venv\Scripts\Activate.ps1
+            ```
+
     * On macOS or Linux, run:
 
         ```cmd
         source ./.venv/bin/activate
         ```
 
+    > 💁 These commands should be run from the same location you ran the command to create the virtual environment. You will never need to navigate into the `.venv` folder, you should always run the activate command and any commands to install packages or run code from the folder you were in when you created the virtual environment.
+
 1. Once the virtual environment has been activated, the default `python` command will run the version of Python that was used to create the virtual environment. Run the following to get the version:
 
     ```sh

1-getting-started/lessons/4-connect-internet/README.md

@@ -178,18 +178,27 @@ Configure a Python virtual environment and install the MQTT pip packages.
 
 1. Activate the virtual environment:
 
-    * On Windows run:
+    * On Windows:
+        * If you are using the Command Prompt, or the Command Prompt through Windows Terminal, run:
 
             ```cmd
             .venv\Scripts\activate.bat
             ```
 
+        * If you are using PowerShell, run:
+
+            ```powershell
+            .\.venv\Scripts\Activate.ps1
+            ```
+
     * On macOS or Linux, run:
 
         ```cmd
         source ./.venv/bin/activate
         ```
 
+    > 💁 These commands should be run from the same location you ran the command to create the virtual environment. You will never need to navigate into the `.venv` folder, you should always run the activate command and any commands to install packages or run code from the folder you were in when you created the virtual environment.
+
 1. Once the virtual environment has been activated, the default `python` command will run the version of Python that was used to create the virtual environment. Run the following to get the version:
 
     ```sh

2-farm/lessons/5-migrate-application-to-the-cloud/README.md

@@ -131,18 +131,27 @@ The Azure Functions CLI can be used to create a new Functions app.
 
 1. Activate the virtual environment:
 
-    * On Windows run:
+    * On Windows:
+        * If you are using the Command Prompt, or the Command Prompt through Windows Terminal, run:
 
             ```cmd
             .venv\Scripts\activate.bat
             ```
 
+        * If you are using PowerShell, run:
+
+            ```powershell
+            .\.venv\Scripts\Activate.ps1
+            ```
+
     * On macOS or Linux, run:
 
         ```cmd
         source ./.venv/bin/activate
         ```
 
+    > 💁 These commands should be run from the same location you ran the command to create the virtual environment. You will never need to navigate into the `.venv` folder, you should always run the activate command and any commands to install packages or run code from the folder you were in when you created the virtual environment.
+
 1. Run the following command to create a Functions app in this folder:
 
     ```sh