fix: MSI installer should warn user about unsupported OS. (#986)

#### Details

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MSI installer should warn user about unsupported Operating System.
Associated Issue: #980

##### Motivation

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Fix implemented for:

- To warn user about unsupported Operating System by displaying a
message as: Axe.Windows Command Line Interface (CLI)

  requires .NET 6, which is supported on Windows 10 or newer.

- Screenshot of the implemented fix: 
  

![image](https://github.com/microsoft/axe-windows/assets/150343275/35a12a0f-0e47-44d4-9309-6916a193dcfa)

- Locally tested all the changes and they are working as expected.

##### Context

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a later PR to handle? -->

<!-- Were there any alternative approaches you considered? What
tradeoffs did you consider? -->

#### Pull request checklist
<!-- If a checklist item is not applicable to this change, write "n/a"
in the checkbox -->
- [x] Addresses an existing issue:
#980
- [x] Added screenshots/GIFs to description above

src/CLI_Installer/Product.wxs

@@ -35,6 +35,9 @@ Licensed under the MIT license. See LICENSE file in the project root for full li
       <ComponentGroupRef Id="ProductComponents" />
       <ComponentGroupRef Id="Net60ComponentGroup" />
     </Feature>
+
+    <Launch Message="[ProductName] requires .NET 6, which is supported on Windows 10 or newer."
+            Condition="VersionNT >= 603"/>
 
     <Launch Message="[ProductName] requires .NET Core Runtime 6.0 or newer. Please visit https://dotnet.microsoft.com/download/dotnet-core"
             Condition="Installed OR NETCORERUNTIMEFOUNDX64 OR NETCORERUNTIMEFOUNDX86" />