Add "Rock, Paper and Scissors" example

Signed-off-by: Ercan Ersoy <ercanersoy@ercanersoy.net>

Author: ercanersoy

rock-paper-scissors/README.md

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+# Rock, paper, Scissors
+
+A rock, paper, scissors game program

rock-paper-scissors/rock-paper-scissors.py

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+from random import uniform
+
+elements = ["rock", "paper", "scissors"]
+
+print("1) Rock")
+print("2) Paper")
+print("3) Scissors")
+print()
+
+player_choice = int(input("Your choice: "))
+computer_choice = int(uniform(1, 3))
+
+print("Player's choice: ", end="")
+print(elements[player_choice - 1])
+print()
+
+print("Computer's choice: ", end="")
+print(elements[computer_choice - 1])
+print()
+
+if (player_choice == computer_choice):
+    print("This game is draw.")
+elif (player_choice == 1):
+    if (computer_choice == 2):
+        print("You lose.")
+    else:
+        print("You win.")
+elif (player_choice == 2):
+    if (computer_choice == 3):
+        print("You lose.")
+    else:
+        print("You win.")
+elif (player_choice == 3):
+    if (computer_choice == 1):
+        print("You lose.")
+    else:
+        print("You win.")