Please, merge my PowerShell examples for all chapters (#106)

* PowerShell 01_introduction_to_algorithms example

* PowerShell 02_selection_sort example

* PowerShell 03_recursion examples

* PowerShell 04_quicksort examples

* PowerShell 05_hash_tables examples

* PowerShell 06_breadth-first_search example

* PowerShell 07_dijkstras_algorithm example

* PowerShell 08_greedy_algorithms example

* Powershell 09_dynamic_programming example

02_selection_sort/PowerShell/01_selection_sort.ps1

@@ -0,0 +1,35 @@
+# Finds the smallest value in an array
+function Find-GRKSmallest
+{
+    param ($arr)
+    # Stores the smallest value
+    $smallest = $arr[0]
+    # Stores the index of the smallest value
+    $smallest_index = 0
+    0 .. ($arr.count - 1) | ForEach-Object {
+        if ($arr[$_] -lt $smallest) {
+            $smallest_index = $_
+            $smallest = $arr[$_]
+        }
+    }
+    return $smallest_index
+}
+
+# Sort array
+function Sort-GRKSelection
+{
+    param ($arr)
+    $newArr = New-Object System.Collections.Generic.List[System.Object]
+    1 .. $arr.count | ForEach-Object {
+        # Finds the smallest element in the array and adds it to the new array
+        $smallest = Find-GRKSmallest $arr
+        $newArr.Add($arr[$smallest])
+        $arr.RemoveAt($smallest)
+    }
+    return $NewArr
+}
+
+# Can't use a default "@()" range notation as it creates static arrays
+$arr = New-Object System.Collections.Generic.List[System.Object]
+$arr.AddRange((5, 3, 6, 2, 10))
+Sort-GRKSelection $arr