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

03_recursion/PowerShell/02_greet.ps1

@@ -0,0 +1,21 @@
+function Write-GRKGreet2
+{
+    param ($name)
+    Write-Host("how are you, " + $name + "?")
+}
+
+function Write-GRKBye
+{
+    Write-Host "ok bye!"
+}
+
+function Write-GRKGreet
+{
+    param($name)
+    Write-Host("hello, " + $name + "!")
+    Write-GRKGreet2 $name
+    Write-Host "getting ready to say bye..."
+    Write-GRKBye
+}
+
+Write-GRKGreet adit