feat: 🆕 Add Measure-CommandInventory script

* Introduced `Measure-CommandCount` function to count unique commands.
* Added `Measure-ModuleInventory` function to list available modules and their commands.
* Enhanced command inventory tracking for better module management.

Author: SamErde

General/Measure-CommandInventory.ps1

@@ -0,0 +1,41 @@
+function Measure-CommandCount {
+    # Count the number of unique commands available.
+    (Get-Command | Sort-Object -Property Source, Version | Group-Object -Property Name, Source -NoElement |
+        Measure-Object).Count
+}
+
+function Measure-ModuleInventory {
+    <#
+        List all available modules and the commands in each one.
+    #>
+    $Inventory = [ordered]@{}
+
+    $Commands = Get-Command | Sort-Object -Property Source, Name, Version |
+        Select-Object Source, Name, Version | Group-Object -Property Source, Name -NoElement |
+            Select-Object -ExpandProperty Name
+
+    $Commands | ForEach-Object {
+        $Module, $Command = $_ -split ', '
+
+        if ([string]::IsNullOrEmpty($Module)) {
+            $Module = '_UnnamedSourceModule_'
+        }
+
+        if ($Inventory.Contains($Module)) {
+            $Inventory[$Module] += $Command
+        } else {
+            $Inventory[$Module] = @($Command)
+        }
+    }
+
+    $Inventory
+}
+
+$Inventory = Measure-ModuleInventory
+$Inventory.Count
+
+$CommandCount = 0
+foreach ($item in $Inventory.GetEnumerator()) {
+    $CommandCount += $item.Value.Count
+}
+$CommandCount