added versioning for powershell apps

preferences/powershell-wpf.md

@@ -3,6 +3,13 @@
 ## General Rules
 
 - Always include `#Requires -Version 5.1` at the top of every `.ps1` file
+- Declare `$Version` immediately after `#Requires`, using semantic versioning (`"MAJOR.MINOR.PATCH"`):
+
+```powershell
+#Requires -Version 5.1
+$Version = "1.0.0"
+```
+
 - Use `$script:` scope for module-level variables — never `$Global:` unless absolutely necessary
 - Keep credential and sensitive values out of code — load from config files or environment variables only
 - Use `.psd1` files for all external configuration (not JSON, not XML, not hardcoded)
@@ -65,6 +72,11 @@ Add-Type -AssemblyName System.Windows.Forms
 
 - Define XAML as a here-string and load it via `[System.Windows.Markup.XamlReader]::Parse()`
 - Use `$script:` variables to hold window/control references so they're accessible across functions
+- Set the window title to include `$Version` after the app name:
+
+```powershell
+$Window.Title = "App Name v$Version"
+```
 
 ## Modules